Thanks. Just to clear up the distraction which has arisen, do I take it that you will be getting a 'balanced flue' ('room sealed') boiler (i.e. the question you should have been asked before people started 'worrying' you!)?I would be getting a new condensing boiler fitted, rather than try and move the current boiler. Probably a Worcester Bosch or Viessman.
Kind Regards, John