Eurostar is being forced to leave hundreds of seats empty on trains to and from London to avoid long queues at stations, the cross-Channel train operator said.
A cut in the number of border officials has increased the time it takes to process passengers departing from London St Pancras compared with before Brexit by 30%, according to Chief executive Gwendoline Cazenave.
The post-Brexit requirement to stamp UK passports for outbound travel is also contributing to the delay.
