We bought from Farmison in their New Year "sale". I was impressed with what we got, but we didn't buy any large chunks.
We ordered from these guys 3 or 4 weeks ago, and it was good enough for us to be about to order more. Not a large choice online. They're reasonably local, so the box shouldn't spend more than the overnight in transit, though it's supposed be cooler this week, and they use that wool insulation.
Again, we didn't buy anything large, but the pork belly strips were great, so getting slab (and shoulder) this time. They've also got pork cheeks.
The bacon - especially the black - is very good. Not cheap 🙃