McGeady was tormenting the Andorran defence while the Republic were varying their attacking tactics to good effect with a mixture of precise passing and long balls which were troubling goalkeeper Josep Anton Gomez.

BBC: Republic of Ireland 3-1 Andorra

The result is, in effect, a liquid sponge, and means the mixture can be stored indefinitely, like ordinary diesel, without risk of separation.

ECONOMIST: To make engines cleaner, add H2O