Oh fine, so I can’t answer this can I, CG? 😉
Obviously, I have to recommend my ex-local – Cask in SW1 for the most astonishing range of rare, different and stunning beers, all available to take awaay.
Beyond that? Well, I have to say that both Waitrose and the Co-Op seem to put a lot of effort in to sourcing a good range of UK beers, and especially so for local beers. Waitrose in Salisbury (Not a million miles away from you, CG) has an excellent range from the likes of HopBack (natch!), Thornbridge, Bristol Beer Factory, Oakham, Meantime, Itchen Valley, Butcombe and more besides. Then they also have some good ‘standards’ from the likes of Brains, Fullers, Adnams et al.
Also in Salisbury, the rather excellent Cambridge Wine Merchants, on Winchester St, just off the Market Square, carry lots of interesting stuff, including that other local stalwart, Stonehenge Ales (Hello, Stig! 🙂 ) as well as some other fascinating stuff. They also do Moor, and the truly lovely Merlin’s Magic is the pick from that brewery.