I have made a telephone call to the number you provided in Nottingham.
They advise the decorative fire is out long out of production and the parts are obsolete.
The parts I am looking for are a burner, and a heat shield ( located under the imitation coal bed).
I have been rooting around for some time so I am aware the parts are not stocked. I have seen complete second hand Baxi Bermuda boilers and decorative fires for sale on the web , however I find pinning down if the equipment for sale is the Baxi B50/3 difficult. I would be prepared to buy a second hand pairing if I could ascertain it was a B50/3.and then use the decorative fire and scrap the purchased back boiler.
Sorry for the delay in my response. The link you advised took me to the manual for the decorative fire. By reading the manual I was able to withdraw the decorative fire from its operating location.
After reviewing the design of the fire, I concluded that the "lip" at the front of the heat shield (under the "coals") was to retain the "coal casting" in its operating location and was not a combustion design issue. The "lip" is 15 inches long and the fire damage to the "lip" is over about a 2" length horizontally and a quarter inch from the leading edge. I concluded this damage is superficial and is not a safety issue.
The burner itself is a oval cross section sheet steel cylinder with two internal strengthening ribs arranged along the circumference. The burner has suffered a very slight heat distortion and the two ribs being stronger than the sheet metal have not distorted. Therefore the sheet metal at the ribs is marginally bigger in diameter than the sheet metal either side. However, the material of the burner is not showing a crack and the nozzles are all in good order.
Accordingly. I am going to continue with a water head test on the burner and then reassemble the fire to its normal operating status. I then plan to invite British Gas to reinspect the fire now it has been cleaned thoroughly in way of the alleged area with is brought about the safety issue.
Having now gone through the inspection process I am in a better technical position to challenge the opinion of the British Gas inspector .