Ok fair enough.
Is this likely to be an expensive job?
I only just got the expansion vessel and pressure relief valve replaced in the summer and could do without another big bill.
I noticed a drip coming from the bottom of my boiler and when I took the cover off I realised it was actually coming from the top of my boiler. It seems to be the plastic condensation pipe (flue?) is leaking water back inside the boiler.
Here's a photo showing a drip of water where it's...