Glow worm 18HXI leak

[Viperjet]

Can anyone help me , I am an electrician not a boiler engineer don't wish to tread on anyones toes!! but My 6 year old boiler glow worm 18HXI has just developed a leaking problem, basiclly we get a good cup full of water out of it a day granted the water trap was full now empty, but having read information on this forum i not sure its just a trap issue, on further inspection you can see rust built up on the combustion chamber, is it possible that this could leak? could it be the seal if there is one between the combustion chamber & the heat exchanger. there is no rust around the condense trap , here some photos