Brits going on holiday abroad this summer have been warned to watch out for dangerous travel adaptors, after an investigation suggested thousands may be for sale online. Capanna also said shoppers should buy travel adaptors from trusted retailers "so they can travel with confidence". ESF tested six regular travel adaptors and eight universal adaptors it suspected could pose safety concerns. To be sold in the UK, adaptors must not have accessible live parts and only one set of pins should come out at a time. But the charity found multiple sets could be exposed simultaneously in six out of eight of the universal adaptors it tested.