Brilliant - I work in the city and I like commuting on my 2000 ZX9R!
Joe, not being funny or anything, but you can probably afford it a lot better than some. What about shop workers, restaurant workers, cleaners, etc etc, who commute in? So projecting it to conclusion, they all have to look for work elsewhere, so shops and services in London start to go out of business because they can't hire low wage staff anymore. So when you take your next lunch break and all the restaurants have closed, I guess you'll be reaching for the sandwiches that you packed before work? Better take some cleaning materials for the office too.
Seems to me that excluding a few older motorcycles will be the least of this ruling's effects.