Thanks for all the replies, waiting for a quote this morning; I told the guy I thought it was a Landy core but he kept mumbling about a special, I think he might be trying to stitch me up, wait and see time, cheers, John.
Just got the rad. back from Shorpe radiators after a recore, it was blocked with lime scale, I never thought of using distilled water; you learn something new everyday. Thanks for all the help guys, I have marked up Boston Radiators for my next venture.