Hi There,
I hope this is some use to you,I have recently bought a TomTom 910,covers all U.K,all Europe,and even Canada,and the U.S.A,which came in handy on our recent trip to Canada at Xmas,(no we did not take the Caravan),and it was Fantastic,without having to keep downloading maps etc,these are all built into this system,HOWEVER on a trip to Looe in Cornwall it got me on a B road for 17 miles,which tested my Towing skills,but we survived to tell the tale,We cannot YET find a download for wide vehicles,but we shall keep looking!The alternative is to check the route and avoid them,(which is easily done),The 910 is so easy to use,but the Garmin has wide load/lorry on it,So different systems have there good/bad points,so whichever you choose i am sure you will be well impressed.Good Luck