Thank you very much for all of your help guys!
Just put a set of new tyres on and think I am just about ready to go
Just have to plod through a week of work now!
In case anyone is interested I think we are going to go along the coast to Ostende on day 1 and camp there. Then a little ride along the ostende bruges canal day 2 allowing plenty of time to sample those belgian beers i've heard about. break into holland on day three maybe camp near middelburg. and day 4 into Antwerp. Might get the train for the last bit into the city if its busy.
Thanks for the heads up re. compulsory bike lanes!!!!