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* Oil, financial stocks lead FTSE 100 higher

* Grafton Group slumps as CEO set to leave

* FTSE 100 up 0.9%, FTSE 250 off 0.2%

July 4 (Reuters) - Britain's top share index climbed on Monday as stable crude prices boosted oil stocks, while investors were waiting for the earnings season to pick up pace to assess the hit to profits from surging prices and higher interest rates.

The blue-chip FTSE 100 closed 0.9% up and the domestically focussed FTSE 250 index ended 0.2% lower with overall trading volumes lightened by a U.S. holiday.

Both the indexes started the second half of 2022 on a subdued note on Friday after a rough first six months on worries that aggressive rate hikes would trigger a global recession.

Oil majors BP and Shell on Monday gained 4.4% and 3.9% respectively, as crude priced rose on concerns about tight supplies amid lower OPEC output, unrest in Libya and sanctions on Russia.

"A small bounce back in the oil price was enough to give BP and Shell a lift and provide welcome support to the FTSE 100 index," Russ Mould, investment director at AJ Bell, said.

"Fundamentally, supplies continue to be tight and there is still enough economic activity to stop oil prices slumping. However, lingering recession fears could act as a ceiling on the oil price."

While the global nature of the FTSE 100 has helped it outperform world stocks in 2022, worries about the slowing economy and surging prices have hurt the FTSE 250 index. It is down more than 20% this year compared with a 2.1% drop in the FTSE 100.

Auto Trader Group Plc added 3.2% after Peel Hunt upgraded the UK-based online car marketplace's stock to "buy" from "add" on stable vehicle demand.

Grafton Group dropped 7.7% and weighed on the mid-cap index, after the building materials supplier said Gavin Slark would step down as chief executive on Dec. 31.

Pets at Home Group Plc slid 8.3% after Royal Bank of Canada downgraded the pet care retailer's stock to "underperform". (Reporting by Sruthi Shankar and Devik Jain in Bengaluru; Editing by Sherry Jacob-Phillips, Arun Koyyur and Andrew Heavens)