Santander Cycles are offering free bike hire for today only, to mark Cycle to Work Day.
The catch? You'll have to dock the bike every 30 minutes to keep it free. Best keep this map of docking stations handy as you take to the road.
Normally it costs a minimum of £2 to use one of the red rides, with costs going up the longer you keep it.
Just find your nearest docking station, and use the code CTWD2018 on either the app or the docking station terminal to release the bike for free.
If your free ride gets you hooked on the two-wheeled life, you can find out more about the usual hire charges here.