Posted: 27/06/2013 at 19:47
Thanks for the suggestions so far everyone! The plant doesn't need to be prickly, I'm hoping that the pots themselves will be enough detterant - there won't be a straight path for the kids to ride across.
I've never had a pyrocantha - why would anyone complain about them? The path is not in anyones way at all, it's next to my house and there is a grass verge before the street (which is a cul de sac)
The wall is part sun part shade. I already have camelia, rhododendrens and mexican orange around my garden so I would prefer something different. Ericaceous plants are not too much of a problem, although I don't have a water butt so would need to give them tap water to drink sometimes.
Will google some of your other suggestions - keep them coming!