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Updated at 1555 GMT

By Pranav Kashyap, Sruthi Shankar and Khushi Singh

April 25 (Reuters) -Britain's benchmark FTSE 100 stock index scored its third consecutive record high on Thursday, led by miner Anglo American on a buyout offer from BHP Group, while investors cheered earnings from several blue-chip firms including Unilever, AstraZeneca and Barclays.

The blue-chip FTSE 100 .FTSE ended the session up 0.5%, after hitting a fresh all-time high of 8,105.59 points earlier in the day.

Anglo American AAL.L surged 16.1% to an more than 10-month high after BHP BHP.AX made an offer to buy the London-listed miner, valuing its share capital at $38.8 billion.

The deal would create the world's biggest copper miner with around 10% of global output. BHP's London-listed stock BHPB.L, however, fell 2.2%.

"BHP has a clear idea what it wants from buying Anglo American – exposure to large, low-cost and long-life assets in iron ore, metallurgical coal, potash and copper. Scale matters in the mining sector and Anglo has the right kind of assets to keep BHP generating big bucks for decades into the future, said Dan Coatsworth, investment analyst at AJ Bell.

The FTSE 350 industrial metal miners index .FTNMX551020 rose 2.0% on the news.

The pharma and biotech .FTNMX201030 index was the top sectoral performer, rising 3.9%, led by a 5.9% jump in AstraZeneca AZN.L shares after the drugmaker reported quarterly revenue and profit above market estimates.

The personal care, drug and grocery stores .FTNMX452010 index followed with a 3.1% rise, supported by a 5.7% boost in Unilever ULVR.L shares after the consumer goods company posted better-than-expected first-quarter sales growth.

Barclays BARC.L climbed 6.7% as the lender's first quarter trading was better than expected despite a 12% fall in profit.

On the flipside, the mid-cap FTSE 250 .FMTC fell 0.6%, with WH Smith SMWH.L sliding 6% after the British high street and travel hub retailer flagged lower growth at start of the second half.

Meanwhile, data showed British retailers suffered their worst April for sales since 2020, when the country was in its first COVID-19 lockdown.

Reporting by Pranav Kashyap, Khushi Singh and Sruthi Shankar in Bengaluru; Editing by Varun H K and Rashmi Aich

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