Yes that's the same element as I the ones I use. An IEC power lead will slide directly on to the prongs, obviously make sure it's rated to 10 amps.
The hole cutter you need for the gasket is 40mm. If you are determined to use a stainles steel gastronorm, I would recommend the qmax hole cutter, but to be honest if it were me I'd just use a food grade plastic container until you are sure it all works how you want it to.
Be aware you may need to make some plastic washers with a 40mm hole to make sure the element fit is totally water tight. Ideally your container will be the exact thickness of the Asda kettle.
The hole cutter you need for the gasket is 40mm. If you are determined to use a stainles steel gastronorm, I would recommend the qmax hole cutter, but to be honest if it were me I'd just use a food grade plastic container until you are sure it all works how you want it to.
Be aware you may need to make some plastic washers with a 40mm hole to make sure the element fit is totally water tight. Ideally your container will be the exact thickness of the Asda kettle.