Latest results for the year to December 31 2021 show pre-tax profits more than doubled at £19m from £8.9m and revenue up 10% to £2.2bn.

The firm is now looking forward to further recovery this year on the back of a record £1.6bn forward order book, after maintaining its zero-debt status and improving its net cash position by 18% to £120m.

Matt Blowers, CEO at ISG, said: “Our strong foundations and continuous focus on optimising innovation and efficiencies have enabled the ISG business to quickly re-establish its financial trajectory, characterised by the largest forward order book in our history.”

He added: “ISG today is a resilient business with a unique culture and clear sense of purpose.

“Our financial strength and deep foundations as a business mean we are perfectly positioned to respond to our rapidly changing world and industry.”

Most of the profit growth last year came from the fit-out business as the market recovered strongly in the UK.