30 April 2025                                                                                

Savannah Resources Plc

(AIM: SAV) ('Savannah', or the 'Company')

Drilling confirms zones of near surface higher-grade lithium mineralisation at Pinheiro and Reservatório

Savannah Resources plc, the developer of the Barroso Lithium Project (the 'Project') in Portugal, a 'Strategic Project' under the European Critical Raw Materials Act and Europe's largest spodumene lithium deposit, is pleased to announce the second batch of assay results from Phase 2 of its Definitive Feasibility Study ('DFS') drilling programme at the Project. The 117-hole, c.13,000m programme is being undertaken for further JORC Resource definition, geotechnical and metallurgical purposes.

Highlights:

·    The Phase 2 drill programme for the DFS is well underway, targeting the Pinheiro, Reservatório and Grandão deposits.

·    To date, 75 holes have been drilled for c. 8,300m in the planned 117 hole/c.13,000m programme.

·    New significant lithium assays have been received from a further 22 holes (5 at Pinheiro, 12 at Reservatório and 5 at Grandão). Assays from 42 holes have now been received to date overall.

·    The initial stage of the Phase 2 drilling is nearing completion and the results from this will feed into upgrading the confidence level of the JORC Resource estimates for each deposit.

·    At Pinheiro, broad zones of near surface, higher grade lithium mineralisation are now being intersected on a regular basis. Better intersections include:

o  20.76m @ 1.48% Li₂O from 44.62m in hole 25PNRDD011, including 9m @ 1.87% Li₂O

o  31.04m @ 1.46% Li₂O from 65.96m in hole 25PNRDD013, including 14m @ 1.73% Li₂O and 12m @ 1.39% Li₂O

·    At Reservatório, the latest assays are indicating zones of higher-grade mineralisation, including some near surface. Better intersections include:

o  27m @ 1.25% Li₂O from 100m in hole 25RESRC050, including 2m @ 2.02% Li₂O, 8.9m @ 1.33% Li₂O and 10m @ 1.4% Li₂O

o  22m @ 1.56% Li₂O from 25m in hole 25RESRC064, including 9m @ 2.00% Li₂O, 3m @ 1.68% Li₂O and 2m @ 1.42% Li₂O

o  22m @ 1.51% Li₂O from 64m in hole 25RESRC058, including 10m @ 2.00% Li₂O and 6m @ 2.89% Li₂O

o  22m @ 1.35% Li₂O from 65m in hole 25RESRC060, including 6m @ 1.68% Li₂O and 3m @ 1.72% Li₂O

·    Recent results from Grandão confirm that mineralisation continues along strike and down dip with better intersections including:

o  13m @ 1.14% Li₂O from 3m in hole 25GRARC140, including 4m @ 1.62% Li₂O

Savannah's Technical Director, Dale Ferguson said, "We have made good progress to date with our field programme as we move towards the conclusion of the Phase 2 DFS drilling. We are particularly encouraged by the continued higher-grade zones of lithium mineralisation we are now consistently encountering at the Pinheiro deposit. We plan to mine Pinheiro very early in Project's development, so any increase in the average grade and size of this orebody could have a positive impact on operating costs and cash flow generation in the Project's first years, and therefore the Project's overall economics.

"This second batch of drilling results has also highlighted zones of higher-grade mineralisation at Reservatório with one being intersected only 25m down hole. The drilling is continuing to build our confidence in the grades and tonnages of the existing JORC Resource estimates and the results are pointing towards the continued expansion of the resources both along strike and down dip.

"This Project continues to reveal strong signs of its greater resource potential which, aside from affirming our early assumptions, confirms why this project is of increasingly strategic importance to Europe. The team and I look forward to reporting further results over the coming months as we move towards the production of new JORC Resource estimates for these orebodies as part of the Project's DFS. Busy and exciting times lie ahead for Savannah."

Further Information

As previously announced, Savannah started Phase 2 of the DFS-related drilling programme at the Barroso Lithium Project in January 2025 (see Figure 1). The programme consists of drilling for resource, metallurgical and geotechnical purposes using primarily Reverse Circulation ('RC') rigs with some supplementary diamond drilling. To date, 8,302m of drilling has been completed of the c.13,000m initially planned for Phase 2. The programme is ongoing, and updates will be provided as further results are received.

Figure 1. Barroso Lithium Project summary map showing deposits and drill hole locations.

Pinheiro

The current JORC Resource estimate for the Pinheiro deposit (all Inferred as at May 2024) is 2.0Mt at 1.0% Li₂O.

The drilling at Pinheiro is building on the Phase 1 DFS programme completed last year, and is continuing to focus on infilling the previous drill programme carried out in 2018. Recent results show that the Eastern Pegmatite continues to carry ore grade lithium mineralisation at depth, with the thickness of the pegmatite generally increasing, although there is some variability along strike. The drilling has focussed on the northern and central section of the pegmatite, which has shown some variability in the orientation in terms of the trend direction and direction of dip, providing a challenge for targeting of the drilling. However, the latest drilling has shown that the Eastern Pegmatite extends to the northeast, with further drilling being considered dependant on results. A drill hole designed for geotechnical purposes (25PNRDD011) contained a significant intersection of pegmatite which returned 20.76m at 1.48% Li₂O from 44.62m.

Two holes were completed on the southern extent of the Western Pegmatite with one hole down dip of the previously reported 25PNRRC030, which intersected high grade lithium mineralisation across the width of the pegmatite (24m at 1.17% Li₂O from 11m and 28m at 1.21% Li₂O from 38m). The diamond drill hole 25PNRDD013 drilled about 50m down dip of 25PNRRC030 continued with high grades over the width of the pegmatite intercept (33.04m at 1.46% Li₂O), highlighting the increased potential at depth. The Western Pegmatite also remains open along strike to the south.

Significant recent lithium mineralisation intersections at Pinheiro include:

o  20.76m @ 1.48% Li₂O from 44.62m in hole 25PNRDD011, including 9m @ 1.87% Li₂O

o  31.04m @ 1.46% Li₂O from 65.96m in hole 25PNRDD013, including 14m @ 1.73% Li₂O and 12m @ 1.39% Li₂O

Figure 2. Location of Phase 2 diamond drilling at Pinheiro with significant intercepts to date.

Figure 3. Cross section 1 Eastern Pegmatite of Pinheiro deposit (Section A-A').

Figure 4. Cross section 2 Western Pegmatite of Pinheiro deposit (Section B-B').

Reservatório

The current JORC Resource estimate for the Reservatório deposit (Indicated & Inferred as at May 2024) is 4.2Mt at 0.9% Li₂O.

Drilling at Reservatório continues to test the down dip and eastern extremities of the pegmatite and continues to demonstrate the extension of the lithium mineralisation beyond the designed mining parameters. Numerous lithium intercepts were returned above the current average for the orebody of 0.9% Li₂O. While the drilling has shown that there is possibly some structural disruption to the pegmatite including several broken zones within the pegmatite indicating possible faulting offsetting the structure and some natural variability to the geometry of the pegmatite, there is suggestion that the pegmatite continues beyond the present planned programme.

Significant mineralised intersections at Reservatório include:

o  30.15m @ 1.15% Li₂O from 129.85m in hole 25RESRC049, including 3m @ 1.46% Li₂O, 6.2m @ 1.79% Li₂O and 5m @ 1.58% Li₂O

o  27m @ 1.25% Li₂O from 100m in hole 25RESRC050, including 2m @ 2.02% Li₂O, 8.9m @ 1.33% Li₂O and 10m @ 1.4% Li₂O

o  22m @ 1.56% Li₂O from 25m in hole 25RESRC064, including 9m @ 2% Li₂O, 3m @ 1.68% Li₂O and 2m @ 1.42% Li₂O

o  22m @ 1.51% Li₂O from 64m in hole 25RESRC058, including 10m @ 2.00% Li₂O and 6m @ 2.89% Li₂O

o  22m @ 1.35% Li₂O from 65m in hole 25RESRC060, including 6m @ 1.68% Li₂O and 3m @ 1.72% Li₂O

o  18.06m @ 0.82% Li₂O from 136.94m in hole 25RESRC048, including 3m @ 1.29% Li2O

o  13m @ 1.11% Li₂O from 105m in hole 25RESRC065, including 2m @ 1.66% Li₂O

o  13m @ 1.01% Li₂O from 159m in hole 25RESRC048, including 5.2m @ 1.30% Li₂O

The drilling operations at Reservatório are ongoing (Figures 5 and 6).

Figure 5. Location of Phase 2 diamond drilling at Reservatório with significant intercepts.

Figure 6. Cross section of Reservatório deposit (Section A - A').

Grandão

The current JORC Resource estimate for the Grandão deposit (Measured, Indicated & Inferred as at May 2024) is 17.7Mt at 1.04% Li₂O.

The drilling at Grandão has continued to focus primarily on the southern extremities of the pegmatite and where it occurs nearer to the surface and will be part of the preliminary mining stages. The drilling has shown that the southern edge is thinner than the central part of the pegmatite with widths varying between 3m to 20m.

The bulk of the Grandão resource has already been classified in the Indicated or Measured category and this round of drilling is giving more confidence to the southern and northern extents of the pegmatite to aid in mine design.

Significant mineralised intersections at Grandão include:

o  13m @ 1.14% Li₂O from 3m in hole 25GRARC140, including 4m @ 1.62% Li₂O

o  19m @ 0.64% Li₂O from 15m in hole 25GRARC141, including 6m @ 1.56% Li₂O

o  12m @ 0.99% Li₂O from 47m in hole 25GRARC141, including 4m @ 1.45% Li₂O

Figure 9. Location of Phase 2 drilling at Grandão with significant intercepts from assays results.

Next steps

The initial stage of the Phase 2 drilling is nearing completion and the results from this will feed into upgrading the confidence level of the JORC Resource estimates for each deposit.

In conjunction with resource drilling, preparation of the specific requirements of core samples for metallurgical testing has commenced. Once results have been received the specific sample requirements requested by Savannah's metallurgical consultants will be sorted and sent for testing.

The drilling of diamond drill holes for geotechnical testing is complete at Pinheiro and is currently being carried out at Grandão before being undertaken at Reservatório. The results from this programme will be used to aid in the design of the various mining pits to ensure maximum extraction of ore under safe and stable conditions.

Competent Person and Regulatory Information

The information in this announcement that relates to exploration results is based upon information compiled by Mr Dale Ferguson, Technical Director of Savannah Resources Limited. Mr Ferguson is a Member of the Australasian Institute of Mining and Metallurgy (AusIMM) and has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the December 2012 edition of the "Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves" (JORC Code). Mr Ferguson consents to the inclusion in the report of the matters based upon the information in the form and context in which it appears.

Regulatory Information

This Announcement contains inside information for the purposes of the UK version of the market abuse regulation (EU No. 596/2014) as it forms part of United Kingdom domestic law by virtue of the European Union (Withdrawal) Act 2018 ("UK MAR").

Savannah - Enabling Europe's energy transition.

**ENDS**

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About Savannah

Savannah Resources is a mineral resource development company and the sole owner of the Barroso Lithium Project (the 'Project') in northern Portugal. The Project is the largest battery grade spodumene lithium resource outlined to date in Europe and was classified as a 'Strategic Project' by the European Commission under the Critical Raw Materials Act in March 2025.

Through the Project, Savannah will help Portugal to play an important role in providing a long-term, locally sourced, lithium raw material supply for Europe's lithium battery value chain. Once in operation the Project will produce enough lithium (contained in c.190,000tpa of spodumene concentrate) for approximately half a million vehicle battery packs per year and hence make a significant contribution towards the European Commission's Critical Raw Material Act goal of a minimum 10% of European endogenous lithium production from 2030.

Savannah is focused on the responsible development and operation of the Barroso Lithium Project so that its impact on the environment is minimised and the socio-economic benefits that it can bring to all its stakeholders are maximised.

The Company is listed and regulated on the London Stock Exchange's Alternative Investment Market (AIM) and trades under the ticker "SAV".

APPENDIX 1: Drill hole locations of Completed Phase 2 RC and Diamond Resource Holes (* with assays)

 APPENDIX 2 - Summary of Significant Intercepts from the diamond drilling using a 0.5% Li₂O Cutoff.

*Significant results from RC hole, diamond tail to follow

** From completed diamond tail

APPENDIX 3 - JORC 2012 Table 1 - DFS Infill Drilling

JORC Table 1 Section 1 Sampling Techniques and Data

JORC Table 1 Section 2 Reporting of Exploration Results