firstly, thanks for all the advice previously given.
Called the RGI out to have a look and he opened the boiler, removing some of the panels that I was a bit reluctant to. He then repressurised the system to 1bar and immediately you could see that the water was leaking not from the heat...
We purchased our house about 18 months ago and it came with a Halstead Eden CBX 32 combi boiler already installed.
About 8-10 months ago the boiler had shown a marked drop in pressure. As this was following a radiator bleed, I didn't think much of it and used the filling loop attached to...