The saga continues.........
I've fitted a brand new fuse box to the Escos now at a cost of £220!!!!!
I realise that's rather steep but the good news is........everything works!!!!!!
I now have a fuel pump which turns off after a few seconds after the ignition has been turned on, headlamp washers that actually wash headlamps and a heated front screen that works!!!!!!!!!!!!
I'm a happy man!!

Thanks to everyone that gave advice on this thread especially Dave who posted much needed piccies!!!

May The Fords Be With You!!