The only reason I used SWA Cable is because of the outdoor environment, not right to T&E outdoors but mechanical protection, surely is unnecessary. Can you tell me what could possibly happen to a cable which is clipped to a wall, visible and out of reach
A metal / alloy ladder could be dropped on it, a lightning strike, a rat chewing, a cat chewing, an eagle clawing, a burglars hob nailed boots.
It's irrelevant that you 'think' the cable is safe and out of harms way. SWA needs earthing !
So in the jb for the te to swa connection-
Provide a metal box
Gland the swa correctly and the swa will earth to the box
Terminate the TE earth and swa core earth on a stud fixed to the box- if the box is painted make sure you remove the paint around both the swa gland and the earth stud (so contact is metal to metal).
It would appear that you have done this work yourself rather than getting a sparks to do it for you. That's naughty because:-
You can't test the circuit correctly
The work is Part P notifiable
It's becomes an unsafe installation by virtue of no testing
You intimated that you would use a spark and as such people helping you won't be doing so again.