By Amanda Cooper, David Milliken and Andy Bruce LONDON (Reuters) -The Bank of England said on Monday it would not hesitate to change interest rates and was monitoring markets “very closely”, after the pound plunged to a record low and British bond prices collapsed in response to the new government’s financial plans. Finance minister Kwasi Kwarteng sent sterling and government bonds into freefall on Friday with a so-called mini-budget that was designed to grow the economy by funding tax cuts with huge increases in government borrowing. Such was the market turmoil on Monday there was growing spe…