The origins of their encouraging remarks have been discussed by All On The Board co-creators Ian Redpath and Jeremy Chopra.
Over the course of nearly six years, the pair have brought joy to the daily commutes of Londoners. They have also released two books of poetry.
Some have been humorous remarks on the state of the weather; others have been more serious discussions of mental health; still others have been inspired by activists like Dame Deborah James.
At the top of Thursday’s This Morning with Phillip Schofield and Holly Willoughby, Ian and Jeremy explained how it all started with the help of one Craig David.
‘We were both working at the station, there was a Craig David concert taking place, all these fans were coming through,’ Ian said.
‘We were going through the Craig David songs that we knew, and we were singing them quite badly to one another, and then we thought, rather than having it say “Keep right” and it was a filthy board, we rubbed it out, put our little poem on it.
‘Everyone was taking selfies with it, it was creating smiles and stuff.
‘We were like, the world needs more smiles, we got a bit of a buzz from it, and everyone else they got a buzz from it too.’
Jeremy and Ian recently wrote on how much it meant to them to have so much support in the wake of their viral social media posts.
‘Hello you. Hope you’re doing alright,’ they began.
‘When we first started almost 6 years ago we thought we might make a couple of people smile, but never expected what has happened to us, to have two books out and most importantly to have saved lives with words.
‘Thank you so much to everyone who has shown us love and support by buying our new book All On The Board: Your Daily Companion.
‘You have truly kept us going in moments over the years when we have both been struggling and for that we are forever grateful.’
Their post was showered in support, with one person writing: ‘It’s going to be very tough week, but you guys always hit home with your boards.’
This Morning airs weekdays from 10am on ITV.