The new 6.16am service will get under way on 5 September, calling at Rotterdam en route to Amsterdam and capable of carrying up to an addition 3,600 people per day.

Eurostar claims this is equivalent to 18 flights.

It means Monday to Friday, Eurostar will offer London-Amsterdam services departing St Pancras International at 6.16am, 8.16am, 11.04am and 6.04pm.

The 8.16am and 11.04am services also operate on Saturdays and Sundays, and the 6.04pm service on Sundays too.

Fares for the new services lead in from £39pp.

Journeys to Rotterdam take around three hours and Amsterdam just under four hours.

Returns depart Amsterdam at 7.47am, 1.47pm, 4.47pm and 6.47pm Monday to Friday. The 1.47pm and 4.47pm services also operation on Saturdays and Sundays, and the 6.47pm service on Sundays too.

Els Buzzi, head of Amsterdam route at Eurostar, said: "The ever-growing demand for high-speed trains between the Netherlands and the UK shows that both business and leisure travellers appreciate the convenience and comfort of travelling by Eurostar.

"The fourth service will give our customers even more choice and flexibility when planning their journey, safe in the knowledge that Eurostar is the greener way to go from city centre to city centre.”