I don't know how the UK looks at year old, NEW bikes, but in USA they are still considered as NEW! They are not registered at all until sold, and if going overseas, then not required they be registered at all.

Registering a "left over", new 2014 would cost quite a bit, and would include sales tax, license. On a $6000 usd (MSRP) DR650, probably about $1000 USD, more or less.

My guess Bridge are buying unsold 2014 models direct from American Suzuki or from regional Suzuki centers. In the USA dealers pay "flooring charges" for a bike after a certain amount of time. (this is negotiable) Once the "free period" is over, dealers must begin to PAY "flooring" to keep that bike on their floor.

At this point, Suzuki will take back any left over bikes dealers do not want, or may suspend flooring charges, this all varies dealer to dealer, all negotiable.

What Suzuki does with them after that varies: Ship to foreign markets, sell to guys like Bridge, or send them back to Japan and CRUSH them. (yes, they DO this sometimes!!!!) But most "left overs" are sent to foreign markets, sold off cheap.

As of now, if you scour Cycle Trader, you will see plenty of left over NEW 2014 DR's for sale nationwide. Also plenty of low mileage used DR's from 2011 to 2013. Even if the bike was an unregistered NO miles 2012, it would still be considered "NEW" by all states.
Prices vary. Check it out!

Dr 650se Suzuki Motorcycles - CycleTrader.com