London's FTSE 250 was up by 1. 19% to 19,973. 21 in afternoon trading on Wednesday, with Spectris leading the index higher.
Wall Street stocks closed higher on Wednesday as the focus shifted between Apple's product launch a day earlier and trade relations between China and the US.
The spotlight on Thursday will be firmly on the European Central Bank's policy announcement.
European stocks added to their recent gains as China confirmed tariff exemptions on some US goods and investors eyed Thursday's meeting of the European Central Bank where rate-setters were expected to unveil further stimulus measures.
HSBC is preparing to put its loss-making French retail lender on the auction block.
London stocks extended their gains on Wednesday, outperforming their peers on the Continent as worries about Sino-US trade relations eased further and with deal news providing an additional boost.
The European Central Bank will guide towards lower growth and a slower return to price stability when rate-setters meet to decide on policy on Thursday.
Analysts at Berenberg upped their target price on 'buy' rated JD Sports from 700p to 800p on Wednesday, stating the group was in "a league of its own" while highlighting the retailer's free cash flow and telling clients worrying that they had 'missed the boat' that the stock's valuation was still impressive.
Telco giant TalkTalk revealed on Wednesday that chairman Charles Dunstone had acquired 3. 87m ordinary shares in the FTSE 250-listed firm, on top of the hefty purchases made just the day before.
Analysts at Bank of America-Merrill Lynch bumped up their target price for shares of Apple, following the launch of the technology giant's new iPhones the night before.
London's FTSE 100 was up 0. 9% at 7,335. 53 in afternoon trade on Wednesday, underpinned by deal news, as concerns over Sino-US trade relations receded.
Wholesale prices in the US edged higher last month despite sharp declines in both food and energy inflation, but economists said that the "inflation threat" lay in consumer prices and not at the producer level.
London Stock Exchange said on Wednesday that it will consider an "unsolicited, preliminary and highly conditional" £29. 6bn takeover offer from Hong Kong Exchanges and Clearing, as analysts expressed doubts that a deal would occur.
Wall Street trading began on a somewhat tentative note on Wednesday as the focus shifted between Apple's product launch a day earlier and trade relations between China and the US.
Sports Direct shareholders voted in favour of founder Mike Ashley's re-election to the board at an annual meeting on Wednesday.
The US President reiterated its criticism of the country's central bank in the middle of the week, arguing that short-term interest rates should be cut into negative territory.
Martin Sorrell's S4 Capital said on Wednesday that it was on course to double in size by 2021 as it reported a jump in first-half revenues and billings.
The US Federal Trade Commission is ramping up an investigation into Amazon over its online marketplace by interviewing small businesses that sell through the company, reported Bloomberg on Wednesday.
Weekly competitions organiser Best of the Best told investors at the group's annual general meeting on Wednesday that it had successfully maintained the positive momentum seen at the start of its trading year.
Sir Amyas Morse has been appointed to conduct an independent review into the loan charge which will examine its effectiveness in dealing with disguised remuneration loan schemes used by individuals to avoid paying tax.