Well, mission accomplished.
Step 5 - gently nick inner conduit which can then peel off. Lowers risk of cutting it with angle grinder.
Step 6 - remove some of outer conduit spring. Crap yourself. Realise you may have buggered it when outer wires splay apart.
Step 7 - think "Bloody hell we have stuffed it!!"
Step 8 - use vice jaws to recollect wires and twist metal reinforcing end back out over conduit wire.
Step 9 - exhale/inhale for the first time since starting the proceedure.
Knocked about and inch and a quarter off the end. Spring has not lost its integrity either.