I'd agree with the sentiment below. It's a pretty good deli but nothing spectacular. They also seem to run out of croissants really quickly on a Saturday...

This butchers is enthusiastic and knowledgeable about food, with a true ability to understand your needs and make recommendations about concept, cut, and cookery technique. Excellent quality in terms of both product and customer service

This place makes the finest, creamiest cheese I have ever tasted, and brightened up a rainy holiday in Wales. The Caerffili manages that rare feat of the creaminess of a mild and the strong rich flavour of a mature. The Perl Las blue cheese has a distinct flavour more reminiscent of rocquefort than stilton.
If you are on holiday in the area, visit the place and try the cheeses (and see them being made if you are there early enough). Also, their grandfather supplied the queen with her first corgi apparently.

This place should be visited for the sausages, which are arguably the best in Bristol - made from Gloucester Old Spot just up the road. The ones with Stilton have a fantastic tang that works well with a clean mashed potato, and the standard Old Spot are great for a breakfast fry-up.
Also quite exciting are the eggs that you pick yourself (discount for bringing your own boxes) and the rows of jars with loose sweets, snacks, grains and pulses.
The proprieter is more than happy to communicate his love of food and occasionally encourages a mini tasting session. If you live in or near Westbury, this should be part of your Saturday shop.