Thanks for all the info guys, hubby managed to get Ignition Relay Switch from local breakers (after a lot of to-ing & fro-ing) and she's now running ok.

I have a 'H' reg 340GL, with what was an intermittent fault originally! but completely died on me on Sunday.
What happened was that I'd be going along quite happily, then the engine would die, by cruising into side of road was usually able to start again & carry on. Now the engine won't start at ...