Have purchased from both these silver and gold bullion dealers with a very good experience from both.
Just a note when buying from Chards
http://www.chards.co.uk
sometimes they take a little time to update their prices not so much the silver bullion but with the gold bullion so do call and double check the price is correct before purchase - they run about 3-4 different sites with alot of content so they can be excused for sometimes taking a little longer to update their prices.
You get discounts on multiple purchases of the same bullion and bulk buy can pip Weighton's prices sometimes.
Weighton Coin Wonders-
http://www.weightoncoin.co.uk
keep on top their prices, but the owner Richard is a very pleasant to deal with and he is willing to deal with any queries.
in short alternate to between the two to find the best deal.