Race the Plane is back at 08:30 on 7 September when 28 teams on stationary Wattbikes will pedal away underneath T2 slipstream racing Air Canada flight AC869 across the Atlantic to Toronto.
The teams from across Heathrow (13 in a team) each pedalling in 30 minute stints.
Teams sponsor each bike at £5,500 which is a huge help in raising the target of £100K for charity, and this year it will be going to: Oxfam, Duke of Edinburgh and the Heathrow Community Fund.
On the day a 'flight and bike map' will let colleagues know who's ahead using bike and plane data. We'll also keep you fully update with stories throughout the day.