There certainly is - the fitting you need is called a 'Leadlok' and they are available from Screwfix direct - and maybe B&Q or other plumbing specialists. They work perfectly well, are easy to fit, so long as the access to the lead pipe (which needs to be straight) is good. Fitting one really depends on your confidence - and naturally the water needs to be turned off outside your house. Water boards do this for free - but charge £50 to turn it back on.....which you can also do yourself with the correct key.
John, July 2008