By Laura McGuire Estate agentFoxtons said improved market conditions helped drive housing sales revenue by 17 per cent in the first quarter of the year, with the value of homes under offer the best since Brexit. The London-focused property group reported a 17 per cent leap in sales revenue in the quarter to £9.5m, up from £8.1m in the same period the year before. At the end of March, the business said the value of the under-offer pipeline was 34 per cent higher than in 2023 and 12 per cent higher than in 2022, the highest value since the 2016 Brexit vote. “This under-offer pipeline is expected…