Celebrity Island with Bear Grylls is now into its third series having proved popular on Channel 4. Albeit gruesomely eye-opening at times.

The series follows a number of celebrities as they are dropped by helicopter onto an inhabited island.

In aid of Channel 4’s Stand Up To Cancer charity campaign, the stars must survive the four-week period with nothing but their clothes and a handful of basic tools.

As far reality TV series go, it’s pretty tough stuff.