Very rarely get out to the shops either - get basics from Next cos I can order them online.
Also buy bits at Tesco as I can buy when doing food shop.
Buy the odd basic thing from M&S.
If I do go on a clothes shop I'd go to Nuke (not sure if that's a chain but from there I get Bench and Firetrap stuff generally) or Selfridges (for Ted Baker or Firetrap) - note this is very rare though so I go once, buy a few key things and then they last me a good while. Did this recently and in December bought:
Leather jacket (Next)
Timberland boots (tan, chunky ones)
Firetrap top
Bench trousers
Tesco jumper
Tesco t-shirt
M&S undies (the usual though just been treated to some La Perla stuff for Xmas from dh - for himself really you understand!)
Other shops I'd look in are Oasis and Warehouse, Miss Sixty (only find the odd thing I like in there though).
I've also bought Diesel trainers.
But mainly it's Next, M&S, Tesco and a few 'designer' bits to go with the plain jeans. I certainly don't spend a fortune on clothes and only have a few of the Diesel, Bench, Firetrap stuff to mix with the cheaper clothes.
If I'm going out I've got maybe 3 tops I choose from and a couple of pairs of trousers - no need to stand in front of the wardrobe umming and ahhing about what to wear!!!