It really isn't a big deal to make it meet British standards. You can do it yourself, or there are garages that will make the changes for you. I think the only big issues are the rear fog lights (easy- about an hour job), the beam pattern of your headlights (can be adjusted using stickers applied to the housings to block the glare), and the amber/red thing. I had my USDM Honda Civic shipped over and had no problems getting it legal.
BTW, are you military? Where in England are you going to be living? I lived there 5 years, so if you have any other questions PM me.