Look out for passengers wearing new blue badges on London's transport network from 12 September.
They're part of a trial which is giving disabled passengers and people with hidden conditions, illnesses and injuries a badge, to alert fellow passengers of their need for a seat on public transport.
Please Offer Me A Seat badges (like the Baby on Board badges) are being tested to help out passengers who need a seat, but sometimes have difficulty getting one.
1,000 people are taking part in the six-week trial to assess how successful the badges are for passengers wearing them, and to gauge the reactions of others. The testers will also have a card that can be shown to TfL staff.
The new blue badge trial follows passenger feedback and TfL research that found some people with hidden disabilities, or those undergoing medical treatment, can find it difficult to get a seat when they need one — particularly if their need isn't immediately obvious.
James McNaught, who made his own 'cancer on board' badge when he was undergoing cancer treatment, has welcomed the trial.
"Getting a seat on transport when you need it can sometimes be really tricky, especially if the reason you need to sit down isn’t obvious to others," McNaught explained.
"When I was undergoing radiotherapy for throat cancer, it meant I couldn’t talk to ask for a seat and the morphine I was taking made me appear drunk. It was a real struggle to get people to understand why I needed to sit down. A badge and card could help make a real difference to the lives of people undergoing drug treatment or with longer term conditions or disabilities."
Any customers interested in taking part can find out more here.