LONDON (Reuters) -Britain’s corporation tax will rise to 25% from April next year, Prime Minister Liz Truss said on Friday just hours after sacking her finance minister Kwasi Kwarteng, U-turning on a promise not to go ahead with the hike. In a Sept. 23 “mini-budget”, Kwarteng had said corporation tax would be frozen at 19%, scrapping the rise planned by his predecessor, alongside a raft of other unfunded tax cuts which have since roiled financial markets. Aimed at driving growth, the 45 billion pound ($50 billion) tax-cutting programme instead battered the pound, forcing the Bank of England to…