I came across this site http://www.grassfreelawns.co.uk/ which is information from a PhD project on grass free lawns. It has a useful list of possible plant varieties that I though might be helpful.
I'm a lumberjack and I'm okay, I sleep all night and work all day. Tiny lumberjack ad:
World Domination Gardening 3-DVD set. Gardening with an excavator. richsoil.com/wdg