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* FTSE 100 up 0.4%, FTSE 250 flat

April 24 (Reuters) - Britain's FTSE 100 index extended its record run on Wednesday as a strong earnings update from Reckitt Benckiser and gains in commodity stocks offset lacklustre performances from Lloyds Banking Group after it reported a slide in quarterly profit.

The blue-chip FTSE 100 was up 0.4%, as of 0721 GMT. The index touched 8,083.92, topping the previous session's peak of 8,076.52.

The benchmark was also on track for its sixth consecutive session of gains, what would be its first such winning streak since August 2023.

Reckitt Benckiser jumped 4% after its quarterly like-for-like sales growth beat estimates and the consumer goods group said it was on track to meet full-year revenue and profit targets.

Shares of mining giants such as Rio Tinto, Antofagasta and Glencore rose between 1.4% and 3.9% as prices of most metals climbed on the back of a weaker U.S. dollar.

Lloyds Banking Group fell 2.9% after the country's largest mortgage lender reported a 28% slump in quarterly pretax profit as rising costs, peaking interest rates and intensifying competition in the mortgage market hurt income.

The mid-cap FTSE 250 was nearly flat at 19,791.21 points.

(Reporting by Pranav Kashyap and Sruthi Shankar in Bengaluru; Editing by Sherry Jacob-Phillips)