By David Milliken and William Schomberg LONDON (Reuters) -Bank of England interest rate-setter Catherine Mann said on Thursday that borrowing costs would probably have to rise further as consumer demand is unlikely to fall soon enough to stop businesses from pushing through price increases. Mann was part of a minority of BoE policymakers who voted for a half-percentage point increase in interest rates in February, because of a concern about rising inflation expectations. She voted for a quarter-point rate hike in March. “The domestic inflation ratchet … has been my central concern,” Mann, on…