By Amber Murray British housebuilder Vistry has warned that its profit will be £80m lower than expected this year due to issues with some of its housing developments. The FTSE-250 firm told markets this morning that it had “recently become aware” of higher-than-expected costs in nine of its 300 developments. Vistry said that the schemes’ cost, including some large builds, has been understated by around 10 per cent. It subsequently lowered its profit guidance for 2024 by £80m, taking expected adjusted profit before tax to £350m, a cut of around 20 per cent. It lowered guidance for 2025 by £30m …