TRXnMe said:
A silicone rubber baking mat does the same job, but you get loads of 'washers' out of one mat, Poundland sell them :)
Excellent idea! - i had the same issue with my stainless pot but the baking mat works like a charm with the tesco elements.
Apologies for changing the conversation back to the safety issue but i thought it was worth sharing - As a few people previously mentioned the tesco elements are 2k2W each and running them in parallell can be dangerous, i've found some online for slightly less than the £6 for the Tesco kettles and are 1k5W which in paralell should be ideal for most standard 13A plugs. It won't quite be as fast at boiling as two Tesco ones but in my opinion is the ideal compromise
They are from a Hong Kong retailer so i can't say how reliable the delivery will be but i ordered two and they took about a week to arrive and all was good.
Unfortunately i can't post the URL's with me being a new user but if you search : "Stainless Steel Electric Kettle Element Tube Heater AC 220V 1.5KW" on eBay it should some up as the first item.