By William Schomberg LONDON (Reuters) – British house prices rose last month at their slowest pace since early in the coronavirus crisis and they look on course to fall as a surge in mortgage costs adds to uncertainty about the economy for home-buyers, a survey showed on Thursday. Enquiries by new buyers fell for a fifth month in row and expectations for the year ahead suggested a slight fall in prices, according to the Royal Institution of Chartered Surveyors’ (RICS) monthly survey. The RICS house price balance – measuring the difference between the percentage of surveyors reporting price ris…