New research has found which used cars are the most relable as sales of second-hand vehicles soars to a five-year high. Data from the Society of Motor Manufactuerers and Traders (SMMT) shows that the used car market grew by 6.5 per cent to almost ttwo million units in the first three months of the year. This is the best first quarter the UK has seen since 2019, with sales of second-hand zero emission vehicles rising 71 per cent, bringing the market share to 2.1 per cent. It has now been revealed that the Ford Fiesta, which is the best-selling used car in the UK, is also the most reliable of th…