Well, NHS suffers from having to go to the lowest common denominator. It would be best for your long-term health to save the tooth. I have several teeth that I have taken good care of for years after root canal, crown and, in one forty-year-old case, a bridge. I would look for an alternative like a drive to Romania for some realistically priced dental work. Here in the New World my wife and I have contacts in Guatemala. When I met her I went there for seventeen days during which time I got five crowns and three fillings for about $800. With airfare it was about the cost of one crown done locally in Massachusetts. The crowns, six years later, are still sound. The bridge is a wonder - the dentist long deceased.

At any rate you probably won't miss the tooth and you will love the swish for years to come. Best to you!