Ok, forget tests on the cable for now. It sounds like you've tested the voltage with the fuse out? Which means you're measuring the supply voltage. Set your meter to continuity (so it beeps) and double check the fuse wire for continuity. If you're certain you've measured the voltage on the downstream side of the fuse, then:
Disconnect the cable at the fuse box. Join live and earth together and measure L-E at the cooker switch. Do the same with live and neutral. You should get a low ohm measurement (something like 0.1 Ohms) This would mean that you should be getting voltage when it's wired up again.
When you test for voltage, test between live and neutral as well as live to earth.
Insulation resistance testing is different to continuity testing. You measure between conductors without linking them together, but you need an insulation resistance tester (which puts 500v into the conductors to encourage them to leak, so that the leak can be measured).