Currently living on the north east Kent coast but spent 12 of the last 15 years living in the US. Also a fan of the (Bonneville) America, and have owned an 2002, 2003, 2005, and 2006 both in UK and in US. Bought the 2003 back from US and currently trying to get it registered in the UK. I have owned it since 2010 and toured the US with it, although I admit to doing it the easy way, using a bike hauler to cover the miles then riding my bike when I get there, means it has less than 4000miles on it from new. Hopefully I can find a way to get it register in the UK (Triumph can't provide a CoC and DVLA say MSVA only applies for bikes less than 10 years old, and so even though it passed its MOT with no issues I am going around in circles!) and will meet some of you on the road.
You will need to jump through the same hoops as kit car builders and get it inspected. They will look for E marked lighting etc., which it may well already have. https://www.gov.uk/vehicle-approval/motorcycle-single-vehicle-approval
BA_Martin. Welcome to the family. And nothing wrong with that for bike moving. Generally DVLA will have your bike inspected and issue an age related plate just ask them. You say it is mot'd so they are keen on that. Do hit the upload a file button bottom right corner and show the inmates your steed. Regards Joe.
Equipment tested for compliance (type testing) gets a stamp of approval for use in that region. In the US that means DOT marking, in EU it means E marking. Doesn't mean a non-E/DOT marked piece of equipment is no good, just means it hasn't been certified, and unfortunately many aftermarket parts are not certified. For example my BUB exhausts will need to be replaced (temporarily) with a used set of Triumph original part slip-ons.