Tonight my Ravensheat condensing boiler started making loud noises when I was running the hot tap. It then started smoking and this smoke was coming out of the outside outlet and out of the top of the boiler's casing.It smelt electrical. I turned off the gas and the noises were still happening although the smoke eventually stopped. When the bad noises were happening I saw that the pressure 'bar' was reading ZERO. Earlier today I had drained, taken off, and put back on a radiator. I didn't know what to do so I called Transco and the man came round and capped of the gas. I wonder if anybody can tell me what to do? Every gas place in the yellow places is not answering the phone - I think because of the world cup. Thank you, sally