 Persimmon PLC LSE:PSN took an extra building safety 350mln provision, reported an increase in cancellation rates and warned of falling house prices and margins in 2023. As a result, the FTSE 100 builder cautioned it is too early for us to provide specific guidance for 2023 given the recent and rapid change in market conditions; our current expectation is for fewer legal completions than in 2022 and this together with a deterioration in average selling prices will have an impact on 2023 margins. 