ozmacca - I didn't find the nickname licht bob, only the English version
Light Bobs, The: The Somerset Light Infantry. (Fraser/Gibbons - my post of May 27 - pg. 190

Looking it up I also had a glimpse at the Greys:
Greys, The: The Scots Greys. The regiment, when first raised in Scotland in 1781 [scil. 1681, W.S.] as the "Royal Regiment of Scots Dragoons", was uniformed in stone-gray coats, there being, an official document states, not enough red cloth procurable in Scotland for all the men. The mounting of the regiment on grey horses dates from about 1700. The sobriquet "Greys" was well established before 1750, as contemporary letters and documents show. pg. 186.
The Lincolnshire Regiment got their nickname "Poachers" in allusion to their regimental march "The Lincolnshire Poacher" (forgot to note the page, somewhere between 190 and 209).

Wilfried