I was just going to add - albeit this from a few years ago - that the Cotswold at Piccadilly always seemed to have significantly more helpful and knowledgeable staff than the one next to Ellis on Southampton St, such that I'd bother walking over there before or after going to Ellis. Reportedly something like they had better working hours so attracted better staff or something. Always found the staff in the Covent Garden Cotswold not very helpful (and often hard to even track down at all).
Mates have said good things about Decathlon (Simond) packs but they don't make them for shorter people unfortunately so I can't verify.
Apologies - didn't realise this was a few weeks old; hope you had a good trip!
Post edited at 01:15