(Bloomberg) -- The pound slid as Britain and the European Union blew through another deadline on Brexit negotiations and the U.K.’s coronavirus situation worsened, while progress on U.S. fiscal stimulus dented appetite for haven currencies like the Japanese yen and Swiss franc.Sterling dropped in Asia-Pacific trading as it became clear that talks between the U.K. and EU would continue past Sunday -- which had been established as a deadline -- and after Prime Minister Boris Johnson detailed new virus-related restrictions for London and southeast England.