Combi boiler flue leak

[Neil1936]

Hello, I have a Vaillant Ecotec combi boiler. The flue pipe extension has started to leak at one of the joints. The internal plastic connection pipe appears to be intact. It still drips when there isn't a demand for the boiler.
I've attached some pictures and moved the joint strap to see. Can anybody please offer any advice and guidance.
Many thanks...

 

[Knappers]

This is usually due to a leak in inner flue which will likely be a combination of perished seals and incorrect fall on flue (should be continuous 5°).
Job for a gas man.

 

[Neil1936]

This is usually due to a leak in inner flue which will likely be a combination of perished seals and incorrect fall on flue (should be continuous 5°).
Job for a gas man.

Many thanks indeed for the reply

 

[Neil1936]

This is usually due to a leak in inner flue which will likely be a combination of perished seals and incorrect fall on flue (should be continuous 5°).
Job for a gas man.

Is it dangerous at the minute being like that ?

 

[ShaunCorbs]

I would argue yes tbh the whole flue run needs replacing also the electrics need to be looked at also

 

[Neil1936]

I would argue yes tbh the whole flue run needs replacing also the electrics need to be looked at also

The electrics are getting sorted Wednesday weve just had a doorway into the garage put in and light switch moved. It's a temp so weve got a light to work in there. I'll get a gas man in to sort the flue