I have a bad leak into the cab. I have tried gunning sealant into the windscreen rubber and it has been previously siliconed in. I'm pretty sure the water gets in from the screen, but could the water be getting in from elsewhere?? Any advice ?? many thanks

There are several blanks and bungs along the bulkhead. Give those a good check.

Mine leaked through the door before, check if the bottom of your doorcards are damp.

Also they rot out where the bed panel meets the bulkhead and oftn it leaks through.