If I remember correctly, Its Amlin.
Pressure washing is something we have not got on the schedule. Cant say good or bad really, never had a claim except when we had a claim against someone else they dealt with it, and sorted in under 10 days.
As for turnover, I don't wish to get into battles... we are VAT registered - case of having to be.
I will just add here, if you give your insurance the wrong info on what they terms as Risk you could be paying higher than you need to. We gave things like window cleaning a low % as we only employ about 5 window cleaners the other employees are not covered for window cleaning. So works out cheaper.
So if you know certain staff are not going to be performing a certain task, dont get them covered.
Dave