OK, if you're heading to Forest Hill pools, while you're in the area you could also visit the local sweet shop, deli, haberdashers, card shop and a great lingerie shop, all on the same road as the pools...
You could try this charity, which I found out about via the Forum: http://www.leeoasis.org.uk/safebaby.html They will collect items from your home. I rang up one Monday and they collected the items on the Thursday.