do you want to mail order (i4detailing.co.uk generally do next day delivery if placed by 2pm.) or just head off to halfords?
You can pick up a meguiars or autoglym clay kit with clay, lube, AG comes with microfibre cloth as well I think, all available from Halfords. I'd consider using a tar remover before claying as well, AG instant tar remover is a always easy to find, or tardis. halfords also sell a megs drying towel thats not half bad. plenty of different types available on line
as for wax, layer up the EGP after the SRP and it'll give a lovely shine and not bad durabilty, apply more layers once a month after washing to keep good beading. I used it for ages on my LY. So I've been told EGP isn't a great base for applying wax's over