London-based quantity surveyor and project manager Cyril Sweett is understood to be preparing to float on AIM in the autumn. The Times

It is thought to be the first time a quantity surveyor has undergone a full flotation.

The company is instructed on the BBC’s £800m redevelopment of Broadcasting House. It is owned by 500 of its 650-strong workforce

It recently it opened an office in Dubai and is working on the Mazdar Initiative in Abu Dhabi, an attempt to create a zero-carbon city.