I believe the issue is actually the Interstitial plate that was installed for Fibre.... or maybe a coincidence and there a faulty connection on the mast itself...
I'm sure at this moment what to do as I don't want the interstitial plate as it sit out too far pushing a sideboard out further and I also want all the sockets behind the side board to match...
this is a brand new apartment after all and I think its a shame to have horrible pointy sockets looking out of place on the wall, however saying that I cannot find the socket that was originally installed by Developers and now starting to think the Openreach engineer may have taken it with him...
However I'm not going to start shouting about that as I've no proof, though I will be inquiring with my neighbours as too the whereabouts of there sockets.