The discovery has meant a change of plans for the building’s owners, Hertshten Properties.

The Roman remains, which will now be fully excavated, are to be incorporated into the new offices – pending planning approval – and opened up to the public.

For the architects, redesigning a building around an archaeological site has had some technical challenges.

“The scheme has been comprehensively adjusted,” explained James Taylor from architecture firm Woods Bagot.

“Simple things like the columns have had to literally move position, so you’re not destroying all these special stones that we found in the ground.”

And so as not to disturb what’s there, fewer lifts can now be installed – and this has meant that the team has had to reduce the height of the building.

But Mr Taylor said the effort will be worth it.

“To actually see people using and enjoying the space, moving through the public hall and down to see the remains, will be absolutely incredible.”