Oh, I see. To be calling it a 'spur' presumably means that you must be assuming that it originates from a ring final?I assumed nothing of the sort - I assumed (still do) that it's a spur from that socket.Well, yes, I imagine we all noticed those two - however (again, I suspect, like yourself), I had, perhaps naively, assumed that the white flex 'disappeared off' somewhere and had nothing to do with the socket and T+E.
As I've just written,that remains my suspicion.And I'm pretty sure it's round flex.
Kind Regards, John