It's not super important, but in the interests of doing a fairly invisible extension to the main incoming phone line (moving master socket) anyone happen to know if BT tend to use one particular JB over another?
eg
would a BT78A look fairly kosher:
The other option (which I actually prefer) are 3M/Scotchlok jelly-crimps but I'm not sure if they ever use these indoors?
No lectures on the legalities ta :)
Cheers,
Tim