Thanks - the problem is that the engineer carrying out the repair said he had not seen this happen before, but he thought that there may have been other similar instances of it elsewhere.
We have an 20 month-old BG 330+ that recently started leaking water. BG were called out and identified a hole had melted in the plastic condensate trap. The heat exchanger & trap were replaced under warranty, but I am very concerned this may be a design flaw and could happen again. I understand...