It's a pity as a few years ago I used to work in the City and Canary Wharf. I could easily have taken a diversion to Kings Cross. In fact I used to drive my 500 up to the City everyday, it was the perfect little car for commuting.
John you are right the spark plugs are deco soakedYou need three things to run an engine.
Spark
Fuel
Air
You seem to have spark now. Hopefully also timed correctly.
Just because the fuel is in the carburetor does not mean it is getting into the engine. I am surprised that they did not remove a spark plug. The plugs should be fuel soaked. If they are, that is why the engine will not start. You can dry them out and blow out the cylinder to dry it out, or just leave them open for a few hours.
If there is no gas in the cylinders then the carburetor is at fault and you most likely have a stuck float or blocked jet. Sometimes you can free a stuck float by tapping on the side of the carburetor with a hammer.
John
You need three things to run an engine.
Spark
Fuel
Air
John you are right the spark plugs are deco soaked
With this being the case can I assume fuel pump is ok?