I am an nhs patient and I have a loose crowned tooth how much will it cost to have it stuck back in

It's very hard to find that information without knowing where you are located. Even then, it might not be available on the Internet. On the following site, which contains NHS Information, are some websites and phone numbers listed where maybe you could get the specific information that you want to find out.

NHS Information - Patient UK (http://www.patient.co.uk/showdoc/33/)