Plumbing Problems in the UK? Ask a Plumber Now.
What do they say when it is serviced?
Do you get drips when it is running but not raining?
If so it could be a problem with the condense pipework internally?
You should not get condensation from this point, this sounds like it is not sealed correctly.
Can you upload a picture?
It looks like it has been sealed with silicone?
It looks like it is leaking from the boiler end of the elbow, are you saying it is dripping from the other end?