mk4 s2 rs turbo escort

can anyone give advise on following issue,

whilst driving car cut and and will not restart, have replaced coil,cap,and leads but still not starting, fuel pumps kicking in and engine turning over, i have checked spark and dont have it at king lead, when checking feeds to coil there only seems to be negatives and no positive?

im not very technical so any help would be much appreciated!!

thanks