Can anyone advise on best way to stop a tree stump sprouting? There is no access for a stump grinder so would need to be chemical. If so, where can I purchase some?

SBK brushwood killer...drill angled holes into the stump, pour this in and seal with some wax, what species of tree is it ?

http://www.vitax.co.uk/home-garden/sbk-brushwood-killer/

SBK brushwood killer is good. Try a garden centre. Drill a few holes in the stump and pour it in. Guaranteed to prevent sprouting and will eventually make the stump rot.

Thanks guys. It's a sycamore. Darned things must be the biggest weeds in the world.