When the cooker switch is turned off I still have power to my oven&hob

Cooker switch?

Hob?

If the unit contiues to work with switch off, the switch is defective.

If you trying to work on wiring and found it live with the switch off, then shut off the circuit breaker.

Use more words to describe the situation, what are you trying to do, what type of appliance?

This is what we call a range. The OP is in the UK (most likely).

lanely, TK is right. You are not really asking a question, and the details we have are not enough to help you. Please tell us more, and also confirm your country so maybe someone local to you can help.

Cooker switch?

Hob?

If the unit contiues to work with switch off, the switch is defective.

If you trying to work on wiring and found it live with the switch off, then shut off the circuit breaker.

Use more words to describe the situation, what are you trying to do, what type of appliance?

Thanks tkrussell,you have answered my question,I will change the cooker switch.

OK great, but what is a Hob?