Digital Rev have different import duties,, I saw for most of there top price items they will pay any duty back you are charged
they offer HK warranty on my camera I bought and local Agent, so I guess I send it to him, he pays for all other returns
Though Personally If I have any problems with Camara, I will deal with Canon, and put pressure on them, they manufacture said item by UK law they are responsible what ever they try and say, with the fact I buy loads of Canon items, and lenses, I am sure they will make the effort.
I have Faith in Canon and their Products, I had faith that there would be no real Problems with the 40D, They learn't a lot from the MK 3 and its problems that I had a feeling they would solve before they released the 40D