I found a good site this morning while looking for a good food at decent prices.  Feedem.co.uk.  Don't know if I'm allowed to put it up here but there was some really good buys on here and the ranges were brill.  Some of these sites only have the better known brands but this site had a brand I used to feed my lot many moons ago!  Didn't know it was still on the go to be honest.  Anyway, there you go. 
PS  I have no connection with that site, just thought it looked a good deal and I like to share a bargain!lol.

You gain free delivery with over £45, with a max weight of 30kg. My other usual site is free delivery over £29, with nothing about weight .

I use them for my dog food and biscuits, you are right they have some great prices.

I have been using them for a few years, very good prices!