OK, a new clue
Continuing the long drawn out soap opera of my 300e and it's glitch...here's a new clue that might be relevant. When driving on bumpy roads the SRS light flickers, as if something is making intermittant contact. The ANTILOCK light still comes on with no set pattern but it's fairly certain that it will always come on. Like I said earlier, I've already replaced the OVP. Many thanks.
1967 Jaguar E-type Series I, 2+2