Sterling, UK stocks fall on concerns Brexit talks have stalled

LONDON (Reuters) - Sterling weakened from five-month highs and stocks in London dropped on Wednesday on concerns that talks between Britain and the European Union to secure a Brexit deal could fall apart.In another highly volatile day of trading for UK assets, financial markets remained hostage to Brexit headlines as British Prime Minister Boris Johnson and EU negotiators raced against time to agree a withdrawal deal.Sterling has surged some 5% since late last week when London and Brussels..