How much are people charging for corporate shoots in the UK?

Largely just done dance music photography (festivals, clubs, arenas, etc) until now, but have some experience doing corporate stuff for mates over the years, largely just FOC or covering expenses, free beer, etc.

Decided to spread my options and managed to secure some corporate work. We're talking a day shooting for a company basically showcasing what they do for their website. Staged shots, showing them in action, etc. Something I feel more than confident doing and hoping I can get some results they'll be more than happy with.

But I'm totally stumped on the cost. Done a search and while this topic comes up often it largely seems to be US based photogs doing corporate and it seems the money is way way better over there. Maybe it's the same in the UK, but I've never heard of a photographer outside the top-top-end guys making £100k+ a year and calling it a "tough 12 months"!

I don't want to low-ball myself but I don't want to take the piss either. So any suggestions more than welcome.