I was looking at some supermarket price comparisons between the UK and Canada this lunch time.  Prices taken from the Tesco and Market Place IGA websites.

Product: Corn Flakes
Size: 750g
Price UK: 2.00
Price Canada: $2.98
Commentary: This product is cheaper in Canada.  Equivalent to 1.74 in the UK.

Product: Pepsi (bottle)
Size: 2 litres
Price UK: 1.59
Price Canada: $1.79
Commentary: This product is cheaper in Canada. Equivalent to 1.05 in the UK.

Product: Haagen Dazs
Size: 500ml
Price UK: 2.50
Price Canada: $5.99
Commentary: This product is cheaper in the UK.  Equivalent to 3.50 in the UK.

Product: Gillette Mach 3 Disposable Razors
Size: 3 in total
Price UK: 3.00
Price Canada: $8.98
Commentary: This product is cheaper in the UK.  Equivalent to 5.25 in the UK.

I think I am better off in Canada overall but I find its good to check against UK prices to see if I am getting a good deal or not.