Hi Piers, Can`t help with personal experience. I have been to Barcelona airport this year, but didn`t get into the city. I`ve found a website for you.
http://www.barcelona-tourist-guide.com/specialist/access-barcelona-disabled.html

and if you write to Prague Wheelchair Association, Benediktska 6,
Prague 1. they will send you an `Accessible Prague` booklet

Hi Jax

Thanks again, i will deffo write to the address and ask for the info, i am really keen to go to all 3 cities i think im gonna have to go to Amsterdam 1st as thats the place i have found the most info on and teh accessible canal crusies has swung it for me.

Piers