Some helpful info for you..
We had a gig booked in Harrogate and when I spoke to the manager he mentioned that they use these for payment. Basically you either get paid before OR a day after the gig. Obviously alarm bells are ringing here!
Anyway weeks go by and he phoned me asking if Event UK had been in touch (they hadn't) so he asked me to call them as something wasn't right.
To cut a long story short, they emailed me with an artist registration form and with the gig being a week away they also emailed me an invoice for me to fill out, which I did and returned the same day.
We actually got the cash paid directly into the bank the morning before the gig which was a relief.
So to sum up what I'm saying.. If you have a gig booked and it's with these guys, SEND AN INVOICE AT LEAST A WEEK BEFORE THE GIG AND YOU WILL GET PAID THE SAME DAY IF NOT BEFORE.
Hope that helps!