Food Unwrapped, Summer Diet Special is on Channel Four at 8pm.

Jimmy Doherty discovers the truth about crash diets, while co-host Kate Quilton investigates the collagen drinks market.

Celebrity 5 Go Caravanning is on Channel Five at 8pm.

Actors Colin Baker, Sherrie Hewson and Todd Carty, radio DJ Tony Blackburn and pop singer Sonia, embark upon a caravan road trip, beginning in Morecambe.

8 Out of 10 Cats Does Countdown is on Channel Four at 9pm.

The comedy word game returns with this all-female edition, hosted by Katherine Ryan, shown to mark 100 years of women’s suffrage.

Gary Barlow at Eden is on BBC One at 10.35pm.

A performance by the Take That musician in front of a 6,500-strong crowd at the Eden Project in Cornwall.

First Night of the Proms is on BBC Two at 8.30pm.

Katie Derham introduces coverage of the opening night of the season at London’s Royal Albert Hall.

Help, My House Is Haunted is on Really at 10pm.

Series in which follows paranormal investigators as they visit haunted houses, beginning at Chillingham Castle in Northumberland.

Dicte, Crime Reporter is on More Four at 9pm.

Return of the Danish crime drama series starring Iben Hjejle. Photographer Bo is kidnapped while on a journalist assignment to Lebanon.