In pictures | The best images of April

The French government has created 3D models of Notre-Dame cathedral in Paris with the support of Autodesk. The models will be used for the cathedral’s restoration after a devastating fire in April 2019. In the days following the fire, reality capture technologies were able to capture data that the models have been based on.

Contractor Taziker has retracked additional sections of the Big One rollercoaster at Blackpool Pleasure Beach, after successfully retracking four sections last year. In February 2020 Taziker completed the retracking of 45m in four sections after working on the project during the off season, after which it was commissioned to fabricate a further 75m.

Readie Construction has become the latest construction company to switch to employee ownership. The move came after Readie’s shareholders sold all shares to an employee ownership trust (EOT). An EOT will allow Readie to pay all eligible employees tax-free bonuses of up to £3,600 a year.

Aarsleff Ground Engineering has installed temporary and permanent retaining walls to allow for three tower blocks to be constructed for developer Comer Group at the Mast Quays riverside apartments development in London’s Woolwich. Aarsleff used a crane-suspended vibrator hammer to install a temporary sheet pile cofferdam around the section of the existing river wall, which required repairs.

A modular steel construction system developed by Modular Walling Systems in Scotland has been used to construct an ultra-strong 3 cu m chamber in the USA for explosive testing as part of a research programme on advanced warhead technologies for the US Department of Defense.

Contractor VolkerFitzpatrick is set to complete 48 new steps leading to Wembley Stadium in London, in time for June’s Euro 2021 competition. The Olympic Steps, which are 40m wide, plus four lifts for wheelchair users and people with mobility problems, replace the steep 1970s pedway that used to bridge open-air coach parks.

Contractor Clearly Renovations has encouraged its employees to make planters for site hoardings citing the positive impact of working with plants and nature to workers’ mental health. Clearly Renovations said that connecting employees with nature benefits the company as a result of having happier and more relaxed employees and better-looking hoardings.