If you're reading this before squeezing on to a packed Tube train, stop everything! There's another way you can make yourself sweaty and disgusting before you get to work. To coincide with National Cycle to Work Day, Transport for London is offering use of the cycle hire bikes for free.
All you have to do is download the official Santander Cycles app (yeah, that's the catch), and you'll get 24 hours of free access to the network of bikes - and you can pick up and drop off a bike as many times as you like during the day. Just be careful not to bike for over half an hour though, or normal charges will apply.
To make it work, you'll need to create or login to your account, hit "renew your activation" and the "24 hour bike access" option, and enter the code CTWD2016 when prompted to unlock the offer, which is worth two whole English pounds. You'll still have to enter your payment details too, so TfL can trace you if you decide to pinch the bike.
The bike network covers most of central London, with extension out towards Stratford in the east and Hammersmith in the West. What we're most worried about though isn't thousands of new cyclists taking to London's roads en masse, but what to call them: Are they still Boris Bikes? Shouldn't they be Sadiq Cycle now?