Alternative bike on track days

[bobthepsycho]

I'm looking at some track days with either trackdays.co.uk or motorsportvision.co.uk

Both sites ask for the make and model of the bike you will be using, but I'm undecided which bike to take on the day, or maybe both.

Has anyone tried alternative bikes with either of these companies? And was there a fee?

I've used Hottrax.co.uk in the past, and there don't ask. Just turn up on whatever and ride.