You are supposed to have a waterways licence for using a canal; joining the British Canoe Union will give you this and 3rd party insurance.
John, you should have called me, if you still have my number :-). I'd take you for a play.
Here is some pics from my hols as I took it to Ireland.
SAM_0034 by
chrstphrferg, on Flickr
SAM_0062 by
chrstphrferg, on Flickr
SAM_0089 by
chrstphrferg, on Flickr
SAM_0084 by
chrstphrferg, on Flickr
With the Skeg fitted its not too bad to keep in a straight line. I paddle with a kayak paddle.