I recently purchased a house which had a current home owners gas safety certificate provided by a CORGI registered heating engineer, certifying that the boiler and system was in good working order (call me naive but I believed that this negated the need for a subsequent inspection as it was in date); however, I have consequently had the boiler and its installation condemed by a British Gas Engineer (illegal connection to the flue by means of the exposed and right angle bends in the coregated aluminimum funneling, no ventilation meaning that an increased likelyhood of carbon monoxide poisioning etc...). This has now been confirmed by four seperate CORGI registered engineers whom I have had out for replacement quotes! Do I have any recourse against the engineer under the CORGI umbrella and is he required to have insurance on which I can claim compensation?