UK's blue-chip FTSE 100 gained 1.2% by 0813 GMT, rebounding from its steepest fall in over a year on Wednesday.
British banks gained 2.1%, after falling 5.6% in the previous session.
Credit Suisse shares jumped nearly 30% on plans to borrow up to $54 billion from the Swiss National Bank (SNB) to shore up liquidity and investor confidence.
HSBC and Barclays were amongst the top gainers on the FTSE 100, rising 2.2% and 3.1% respectively.
Rentokil Initial jumped 6.6% to the top of the FTSE 100 after the pest control services provider posted a nearly 28% jump in full-year adjusted profit.
The more domestically-focussed FTSE 250 midcap index gained 1.2% as asset manager Bridgepoint Group rose 6.8% after reporting a higher revenue for 2022.
(Reporting by Shashwat Chauhan in Bengaluru; Editing by Savio D'Souza)