Works will take 86 weeks on the original John Nash building which will be home to 63 new luxury residential apartments and nine mews properties with prices starting from £3.95m to £18m.

Steven Farmer, Divisional Managing Director at SPIE UK, said: “We are delighted to have the opportunity to work on a development with so much historical significance.

“The team’s expertise will ensure that residents of Regent’s Crescent get to enjoy their new homes to the fullest, having been completed to the highest standards, deserving of a building like Regent’s Crescent.

“Moreover, the depth of expertise our team possesses in respect to coordinating and delivering such technical contracts  will ensure that works are delivered in a timely manner.”

Colin J Dyson, Operations Director for main contractor Midgard Ltd, added: “From the outset it was clear that SPIE had the proven track record in delivering the services that we were looking for at Regent’s Crescent, particularly in respect to their work on other iconic buildings.

“SPIE’s specialist technical skills and extensive experience made them the perfect partner and we have full confidence that they will deliver a high-quality output that meets our exact needs.”