I used to live in Ascot, the Waitrose in Sunningdale was a sight to behold I can tell you.
Surprised nobody has mentioned Netto yet, I won a 20 minute trolley dash round one, I managed to fill it to the brim and won £28 of goods.
Very similar I shop at Aldi because it is closer to my house.
But there are some small differences I suggest you go to Aldi and decide which one you prefer.
I believe that Lidl has a madder mad middle, just.