By Huw Jones LONDON (Reuters) -There will be no access to the European Union for Britain’s derivatives clearing houses after June 2025, the bloc’s financial services chief Mairead McGuinness said on Friday. Britain’s departure from the EU has largely severed the country’s financial services ties with the bloc. But clearing in London of euro-denominated derivatives for banks and asset managers in the EU was allowed to continue because of the risk of market disruption if the huge volumes involved had to be moved in a short time. The London Stock Exchange’s LCH business holds 92 trillion euros in…