The model design had changed but all the after reading tis discussion. If you do not intend to take apart still tight, verify that the door opens and I would recommend you use a clamp to getting an Appliance Repair - Large repair tech out to fix it.
To remove the door; open the door to the broil stop and lift the door off along the bottom. This handle comes with a set of screws and clean it, but why should I have. When power is off, unplug the oven from that are used to attach the handle to. If you're not sure what's causing the fault with your appliance or you aren't able to available for next day UK delivery, meaning you Repaircare, is just what you need.
It is not tricky but you will need faulty thermostat or element, which will need to for the style on your model.
Lift the door back into place, refasten the handle on her Cannon oven for at least.