Tried and Tested Designs

Footwear
Scarpa SL series boots seem to be a staple of the club, but you should wear what's comfy. Vibram soles are highly recommended, and used by many boot manufacturers.

Base Layers
Helly Hensen Stripe top and bottoms are the classics. They make you stink but are perfect for mountainous persuits.

Cheap, but perfectly good, thermals can be got from Primark. They also stock thin fleeces from time to time, which are excellent for an extra layer when it is a bit colder, or as a light, but warm, spare layer to carry in your rucksac. Lidl and Aldi also sell cheap and cheerful thermals, base layers and fleeces from time to time.

Charity shops also are good places to get cheap hill clothes from - they normally have lots of woolly jumpers which are also really good for keeping you warm on the hill (especially under a waterproof if it is a bit windy). Maybe not that flashy or trendy, but they will keep you snug on the hill in winter (or summer when the weather thinks it is winter).

You don't need to spend a fortune to be warm on the hill! You don't need to have the latest, flashy gear. Just lots of layers and some spares.

Waterproofs
Mountain Equipment Gore-tex Paclite Shell jackets are common because they are always on special offer.

Bottles & Stoves
Plastic Nalgene or metal Sigg bottles are old classics, although many now are using Camelback or Platypus hydration packs, which still freeze in winter. A handy tip if faced with a frozen tube is to route it up under your jacket rather than leave it out in the open, this tends to keep the water warm. Also blowing any liquid back into the bladder helps. (Taken out of context, the previous two sentences sound very wrong.)

Dry Bags
Alpkit Gourdon dry bags are fast becoming established.

Compasses, Maps & Cases
Silva Ranger no. 3 or Expedition no. 4 compasses are all anyone ever uses. Ortlieb brand map cases seem to be the only ones worth having (e.g. actually waterproof), although the club generally only uses laminated/waterproof maps (usually OS Explorer and occasionally BMC or Harvey's maps) so map cases are rarely seen on club trips.