He didn't really say anything but just got awkward and said 'we as a company wouldn't be able to proceed with the work without an upgrade' pointing at this:
I'm not a sparky, but having a similar set up and when we are having the kitchen done we were told by a mate sparky that we could have an RBBO switch fitted to feed the fuse board or just have another spurred consumer unit.
He didn't really say anything but just got awkward and said 'we as a company wouldn't be able to proceed with the work without an upgrade' pointing at this: