Boots/mothercare have a sale online and there sun suits are included
We had an Asda one last year and it was good! I think next are about to have a sale
I was in Gran Canaria last week and used the swim suit from Asda, it said it was UV 40. I really liked it and found the quality very good. We were in and out if the pool and o found it protected his skin well x
I usually get the ones from next