Transport hubs across Britain are told to "be vigilant" as police continue to investigate three packages that may have been sent as part of an Irish dissident plot.

Counter terror police are still investigating after improvised explosive devices were sent to three major London transport hubs on Tuesday.

Whitehall sources said searches were going on to locate any other similar packages that might have been sent but had not yet been identified.

On Tuesday night, Scotland Yard circulated images of two of the packages to sorting offices and transport workers in the capital, telling staff to "be vigilant and report suspicious packages to police".

Sussex Police were also contacted by the Met Police, and in response to the packages, officers carried out precautionary checks, and increased visibility and patrols at Gatwick Airport. This increased

A spokesman told The Telegraph: "No suspicious packages have been reported at Gatwick Airport at this time and the airport is operating as normal."