Royal Mail's busiest day of the year - The Herald videos

www.theherald.co.uk An inside into the process of sending a letter through the Royal Mail's sorting office at Springburn, Glasgow, during the busiest time of the year - Christmas.

[@palmersperry]

Red envelopes can also be a pain for the postie on the street to read if the light's bad.

[@BatDyke]

@Gazzer1966 - that's a really interesting point about the red letters not being picked up by the automatic sorter. If I'd known that a minute ago I wouldn't have written straight on my Mum's Christmas card envelope and used a sticker!

[@Aggadoosk]

Sad