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This one weird trick could increase the capacity of the UK's motorway network by around a third.

Because seemingly some drivers are unaware a secret third lane exists on motorways like the M1 and M69 in Leicestershire.

To the left of the middle and right hand lanes of the motorway there is a third lane which drivers are allowed to use.

It is not exclusively reserved for lorry drivers and caravan towers.

Don't believe us? We consulted the Highway Code and it's true.

Clause 137 and 138 states: "A dual carriageway is a road which has a central reservation to separate the carriageways.

"On a two-lane dual carriageway you should stay in the left-hand lane. Use the right-hand lane for overtaking or turning right. After overtaking, move back to the left-hand lane when it is safe to do so.

"On a three-lane dual carriageway, you may use the middle lane or the right-hand lane to overtake but return to the middle and then the left-hand lane when it is safe."

So there you have it.

Please share to raise awareness!