A calculator on the homepage of Aldi's website claims that I could save £83,317 over the course of my lifetime if I stopped doing my £130-a-week shop in a mainstream supermarket and instead went to my local Aldi, writes Elizabeth Rigby.

Of course, it would mean that I would only be able to pick from 1,100 different lines rather than the 20,000 products available in a typical supermarket, and there would be no branded goods, such as Kellogg's cornflakes and Pepsi-Cola, in my trolley.