Every couple of years, Gillette reveals the latest breakthrough in shaving technology. That has often involved adding more blades to its razors. More blades must equal a better shave, right?! One, two ...

The price of razor blade cartridges has surged by as much as 99 per cent in just three years – driving many men to adopt designer stubble. The cartridges cost less than 10p to make, but shoppers are ...