No spark :(

I've got no spark on my 16ver

I has been sat for a while ( with no battery) and the ignition system was fine when I parked it up to fix the engine.

I'm not getting any spark through the king lead from the coil.

I did get a brief spark earlier but then it went back to not sparking. I know both coils, icms and king leads i have work (tested on seperate car). The connection to the dizzy looks to be a bit dodgy, although it is all connected it could be redone - would this cause a loss of spark as there is a break in the circuit due to the dodgy connector?
Also could a bad earth cause the loss?
I cant see any water in the fuse board or anything like that, the fuel pump primes, fuel is being drawn through the system and it turns over easily.

My electrical knowledge is minimal, so im only guessing at this point. Not really given you a lot to go on - sorry about that!

Cheers

dizzy plug is how  the ecu knows the engine is cranking so for sure if you have a dodgy connection here you'll loose spark. the hall senders inside can go as well particularly if the internal oil seal is leaky as oil eventually breaks down the insulation on the wires inside