HQ - I hope this is ok, but I volunteer for a Community Interest Company @apparelxchange.co.uk and we're fixated on keeping the impact of textiles on the environment down to the minimum. (We're not making ANY money).
This is the facebook page
www.facebook.com/apparelxchangeCIC
We have a new place at 47 Haggs Road, Glasgow G41 and we are having a mega sale tomorrow and Saturday from 10 - 5.
If you have primary school aged kids, you'd benefit from coming along because no doubt they've lost all their jumpers and "carnians" (though my P1 seems to have "acquired" a couple more 
from last week - when she had none)
The uniforms are lightly worn, superb quality and very cheap. And you can get 20% off if you sign up on Facebook.
If you want any more info, please PM me or post on the thread.
(HQ - I'll also post this on journalist request too - I think it's ok to post here because it can be of massive benefit to the community, but you can tell me otherwise if not)