When he heard the last Royal Mail Travelling Post Office Train was to run in 2004, Ian Cryer arranged to document for posterity the Royal Mail Staff sorting post at 90 miles an hour from Plymouth to Bristol.

His painting has now been turned into a stamp as part of the Royal Mail Heritage: Transport set as part of the Royal Mail 500 celebrations.

Now President of the Royal Institute of Oil Painters, Ian Cryer talks on London Live about the process.

The original painting, along with many other of Ian’s works, can be seen at M1 Gallery in Greenwich until 5 March 2017