We've used Berriewoods, who are good for minces but not so great for chunks/bones.
We have just got an order from
http://www.rawtogo.co.uk. We just unpacked it, the mince packs were a very good size, beef chunks were huge!! A few of bone choices; chicken wings + carcasses and Turkey wings and Necks...this works out ok for us as we get free marrowbones from the butcher, we also buy her lamb shanks. Only downside is that the delivery price was quite steep (£8 for me) but it was well packaged; 2 polystyrene boxes in a cardboard box.
Pretty good prices too ...comparable to landywoods. Not managed to order from Landywoods yet; thier delivery dates are always at the wrong time.