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Crossrail has launched a competition to name three of its four pairs of tunnel-boring machines (TBMs), ahead of their launch in March this year.
A panel has now whittled public suggestions down to a shortlist of ten pairs of names and people are now being encouraged to vote for their favourite.
After their naming ceremony, the TBMs will be working almost non-stop for 365 days a year in order to complete the highly complex Crossrail project, which will see a series of huge tunnels bored right under the centre of London.
The machines will have to negotiate other underground lines, sewers, utility tunnels and building foundations at depths of up to 40m.
Crossrail said: "Teams of dedicated construction workers will be working 24 hours a day to complete the tunnels for Europe's largest civil engineering project."
Each of the TBMs weighs around 1000 tonnes, is up to 140m in length and 7.1m in diameter.
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