Hi, thanks comrades!
I have checked that it sparks, which it does, when held against engine.
There was some soot, so I wire brushed it and cleaned it anyway with carb cleaner.
In fact, the bike runs when the plug is out on one cylinder.
My mate said that sometimes the fuel line or carb gets blocked up, so spray some carb cleaner down the fuel line, after unattaching from the On/Off valve at the tank.
I am guessing it has compression as I could feel it on my hand. But I have no way to check if it is correct?