After much fiddling with bulbs I cannot get my rear fog to work!!!!

Fuses seem ok so I'm left with switch, however the light comes on te dash?!?

Anyone have any dealings with this type of problem?

check for power to the cluster with a multimeter.

i suspect its the bulb holder, they can be a bit iffy at times.

check the mounting for the bulb and refit.

Not teaching granny to suck eggs here but you do know mk1 octy only has one rear fog??? (Just you say rear fogs and bulbs in your text, I.e. plural)

Jus' checking

Yeah I was aware, my second option is to have them both activated, apparently that can be done??

Yes. Run a live feed from the right to the left clusters.