Preferably Glos/Bristol or nationwide delivery.

Ta

wickes do them 99p

http://search.wickes.co.uk/search#ts=ajax&method=and&w=sandbag&isort=score

http://www.akdn.org/images/programmes/akaa/zoom_akaa9_sandbag_1.jpg

Ebay

http://www.ebay.co.uk/sch/i.html?_trksid=p2050601.m570.l1313.TR0.TRC0.Xsand+bags&_nkw=sand+bags&_sacat=0&_from=R40

A friend of mine has about 3 tons of fine playing sand that he wants to get rid off.

Its lush stuff.

Army surplus stores usually have a few

Local council usually have a huge stock pile of them. Often for free...