Next door to Collins Ltd is Scope, a charity shop in aid of cerebral palsy which is currently trying to convince the public that it has something called a 'Springwear Collection' available among the second hand goods and books that are on sale.
Intelligentgiving.com rates Scope better than the nearby British Heart Foundation, as 65% of the money they spend is classed as 'charitable' activity, and they do not hoard all their cash in the bank without putting it to good use (they have a 3 month operating reserve). As well as raising awareness of cerebral palsy - the word 'spastic', so prevalent in my childhood, has all but gone from the lexicon of common insults - the charity are involved in public campaigning on disability discrimination, lobbying and influencing government on disability issues, education, residential care and job placements.
They do, however, tend to over-price their second hand books, which are much more expensive than at Oxfam or Crest and some of which can even be acquired cheaper on ebay.