friends Myson Apollo boiler pilot light is acting up. I have changed the thermocouple and used a compressed air line to clean the pilot injector.. when testing the pilot light i noticed that the pilot flame was being blown downwards by incoming air from the flue. The 'sound' from the flame at this time decreased. when the wind died down the flame intensified and reached the tip of the thermocouple, pilot light stayed alight and the boiler fired. However the pilot light went out the following day and she hasn't been able to relight it. I had tried adjusting the gas pressure for the pilot light as per the manual, but this seemed to have little if any effect on the strength of the pilot light flame.. prior to all this her boiler had been clanking on firing up and pilot light would go out, presumably due to the overhead stat kicking in. pump problem has now been sorted. Your help would be gratefully appreciated