London to the Albanian capital, Tirana, using only public transport: that is the challenge facing the 180 participants lining up to speed across the continent in the second annual Race Across Europe . The trans-European competition, organised by Lupine Travel of Wigan, begins at Trafalgar Square in the UK capital at 10am on Saturday 17 August . Travel by bus, train and ferry is permitted, but flying and hitchhiking are banned.

Racers from 16 different nations have up to a week to reach Tirana – a direct distance of 1,200 miles from London . Pre-planning is impossible. The organisers say: “On the start line, each entrant will be handed a race pack with details of several themed checkpoints along the way.

“Checkpoints will vary from things such as a selfie in front of a particular landmark, or they may be manned by Lupine staff.” Participants have told only that the first checkpoint will be in the Belgian city of Bruges . They are allowed to book their first journey from London – probably on Eurostar via Brussels, or by international bus if they are going for the cheapest trip.

The giant international coach company, FlixBus, is providing discounted tickets – but rail, where available, is likely to be much faster. The entrants’ ages range from 13 to 71; under-18s must travel with an adult. The gender split is roughly even.

The fastest five will win cash prizes. There is also an award for the traveller who spends the least on their journey, though this cannot involv.