Thank you for all you're help, I'll do some investigating over the weekend and let you know how i get on.

Hi Bob

It's really random..

does'nt attempt to turn over - then eventually starts (so far).

All lights come on so not battery

Do you mean the click noise when you turn the key ,before the glow plugs lights go out?

Was hoping if it's a fuse/relay or something similar i could do myself?

Does ...

Hi all.
My bongo seems to have trouble starting, i turn the key wait for the orange glow plug lights to go out and nothing happens?
Is this a glow plug failure or a relay or fuse problem? or something else.

Help much appreciated