(For a live blog on European stocks, type LIVE/ in an Eikon news window) Dec 10 (Reuters) - European shares were little changed on Thursday after a meeting between Britain and EU leaders on a trade deal failed to yield a breakthrough, while a European Central Bank (ECB) decision due later in the day kept investors from making big bets. The pan-European STOXX 600 index was flat, while London’s FTSE 100 rose 0.5% as the pound resumed its slide. British Prime Minister Boris Johnson and European Commission President Ursula von der Leyen gave themselves until the end of the weekend to seal a new trade pact after failing to overcome persistent rifts at dinner on Wednesday. Around $1 trillion in annual trade, currently free from tariffs and quotas, is at stake if there is no agreement. Investors will also be watching for the outcome of a keenly awaited meeting of the ECB when it is expected to unveil details of promised fresh stimulus measures. The decision is due at 1245 GMT, followed by a press conference at 1330 GMT. (Reporting by Susan Mathew in Bengaluru; Editing by Arun Koyyur)