Second in the series in which Katy Hill and Trevor Baylis test new British inventions before a studio audience, who vote on which is the most effective. This week a device to help with hanging wallpaper, a self-extinguishing chip pan in case of fire, and a doorbell for dogs who want to be let back in. Producer Catherine Mabb ; Series producer Alison Gregory
Repeated with sign language at 3.10am Brain box: page 10