Thanks to Ben, it was fidly but actually straight forward after retrieving my Torx bit with some BluTac on a stick. I broke the magnet version years ago.
Four Torx bolts. One 180mm deep in the dark undone.
Remove top two but only loosen bottom two that hold slide in tabs.
I undid top gour screws on grille and spaced it away with screwdriver handle.
Move light out like this to get to modified bayonet type fixings.
I bought a replacement bulb, except the pins are offset but it needs directly opposed pins.
Thankfully I had some in my toolbox I made in 1981 for my first car.
When pliers and two screwdrivers plus a plug spanner fixed everything at the roadside.
Good old days.
Bulb fits in stalk.
Stalk is bayonet fitting too, only one way to fit it.
Of course Galaxy failed on a sidelight as well
I got a replacement. Regular type.
BUT it had LED types fitted.
So same process to remove headlight.
This was removed.
So now I have two different looking but working lights.
Could this be a fail again? I dont care at this point.
Only a rusty brake line left to be fixed or replaced by a real mechanic.
Then retest.