Hi Terry,
Just by way of an update. Got my bike back from the shop. I got in touch with a shop near by and asked if they had Di2 testing kit and they did. Anyway, dropped it off and got it back in less than 2 weeks. Received video updates of the repair which was really interesting. Turns out the BB was sitting pretty damp - it is a CX bike. This mean the B Junc box was also susceptible to water ingress. You can see in the picture the adapter has lost its male pin. Anyway, that’s been replaced, 2 cables, BB and a new chainring…bikes eh! The mechanic moved the B box to the seat tube so it is out of harms way as well.
Anyway, I can now store it indoors without removing the seat post after a ride. Result!
Thanks for your input.
Scott