Construction activity slowed to an 11-month low in July on the back of political uncertainty and nervousness among businesses about Brexit, according to the latest survey snapshot of the sector.

The Purchasing Managers’ Index came in at 51.9, the lowest since August 2016. It’s down from 54.8 in June, and well below the 54.5 reading that City of London analysts had expected.

Any figure above 50 signals growth.

The commercial activity index slipped from 52.2 to 47.6, its lowest since the immediate aftermath of the Brexit referendum in June 2016.

Housing construction activity also moderated, although remained in positive territory.

“Worries about the economic outlook and heightened political uncertainty were key factors contributing to subdued demand. Construction firms reported that clients were more reluctant to spend and had opted to take longer in committing to new projects,” said Tim Moore of IHS Markit, which compiles the PMI survey.

“Parallels with the darker days of Brexit, worries about the UK economy and post-election uncertainty can be seen across the construction sector,” said Duncan Brock of the Chartered Institute of Procurement & Supply.

Weakest reading since August 2016

Construction accounts for around 6 per cent of the economy.

Last week, the Office for National Statistics estimated that the sector contracted by 0.9 per cent in the second quarter of 2017, helping to deliver lacklustre overall GDP growth of 0.3 per cent.

This followed a 1.1 per cent expansion for construction in the first quarter.

On Tuesday, the manufacturing PMI data for July beat expectations on the back of exceptionally strong exports.