We got ourselves some wide gravel boards and cut them into 5ft lengths.

When walking the plank then use the best weeding hoe on the market...
http://212.9.164.213/public_uk/produkte/prod00.hbs
Look for the Small Push Pull Weeder (RF M 10) and a suitable handle which
come in various lengths and either ally or wood, so get one to suit you for
size/feel.
( the big weeder is too big for getting round plants easily IMO but great
for bare ground)

Popped into homebase on the way home form work to buy some more 3" pots
- interestingly, they stock this range (and handles etc etc). May be a
daft question - but how does this work ?? Does it just disturb the soil,
and I then collect the weeds by hand ?
(only £8.99 + handle - so very tempting...)