The property market had its quietest May since 2012, HMRC data shows.
Property transaction figures from the taxman show there were 89,830 sales on a non-seasonally adjusted basis last month.
This is the lowest figure for May since 75,350 transactions were recorded in 2012.
The statistic is down 5.8% annually but up 0.9% on a monthly basis.
The biggest drop was in Wales, where sales fell 24.5% over the month to 3,040 and 30% down compared with 12 months ago.
Transactions in England rose 2.3% on a monthly basis to 75,640, but were down 4.7% annually.
In Scotland, sales fell 0.7% over the month to 7,920 and were down 4.5% annually, while volumes rose 9.4% in Northern Ireland on a monthly basis to 2,230 but fell 0.8% annually.
The provisional seasonally adjusted figure of residential property transactions decreased by 6.4% between April 2019 and May 2019, and was 11.3% lower than May last year, at 89,810.