Thanks for your help guys

Been playing again this morning and still no luck. I plugged in the connector and pushed the back of each pin in with a small screwdriver so pretty sure the connection is good now.

I unclipped the top of the MF unit expecting to Find a relay with contacts I could clean in it but no so luck, all solid, surface mounted components but it does look very clean in there, no corrosion on the tracks or anything.

Looks like finding another flash bulb is my only option of just go without it. I have seen quite cheap Heng Long flash units with a similar looking bulb on the end, wonder if I could adapt one of those to fit?

Cheers

Craig