By Chris Dorrell With elections in both the US and UK this year, 2024 could turn out to be a volatile year for markets. Historically, London markets put in a strong showing around elections. According to AJ Bell analysis, the FTSE All-Share has seen double-digit percentage gain in the first year after an election when there is a change in Prime Minister. Even when the governing party remains the same, markets record greater than average gains. This time around is likely to be no different, at least as far as the UK is concerned, given the relative sanity of the Conservative and Labour party. P…