I thought that it was to commemorate the taking of the drunk's wallet by the 1/5th Highland Light Fingers in 1715 (A quarter past five). This led to the development of the security sporan 2 years later. It is the Fod prevention measures being developed for the sporan that is causing a hold up to production because the velcro is snagging on the beaver skin and causing excessive wear to the grouse and peacock feathers.
I also note that the labradors have been replaced by a Terrier battalion under New Labour's army reforms. (Part of re-sizing). These Treasury driven efficiency measures have led to the regiment's nickname of "Brown Jobs".