Harold Liittlwood was killed in Flanders on July 1st 1916 aged 24. The 1911 census describes him as a 'pony driver', presumably meaning he was one of the lads who guided the pit ponies along the shafts. This postcard appears to date from c1911 when he was 19, he was a featherweight boxer who had at least 20 professional fights between 1911 and joining up in 1914.

trees.ancestry.co.uk/tree/26677730/person/12474415435

on the back of the card is written in pen

He proves that since the world began
Its natures cunning trick
That oft times the little man
Can give the biggest kick