By Harry Robertson LONDON (Reuters) -Sterling regained ground against the dollar in volatile trading on Wednesday after the Bank of England (BOE) said it would step in to calm the turbulence in the UK government bond market. The pound fell as much as 1.74% after the BOE’s announcement but clawed its way back into the green to stand 0.2% higher at $1.0737 in late London trading. The euro was up 0.4% against the pound at 89.71 pence after paring earlier gains. UK assets have tumbled in recent days after new Finance Minister Kwasi Kwarteng on Friday announced a swathe of tax cuts to be funded by …