Article written by Greg Allwood
Next week the Rifles will perform the Sounding Retreat at Horseguards parade for the first time in more than 20 years.
As part of the preparations the regiment's bugle majors have enjoyed a special treat in London - having their trademark mutton chops trimmed.
Pioneer Sergeants are known as one of the few positions within the British Army that permit facial hair beyond a basic moustache, but they are not the only one.
While bugle majors do not grow a full beard, they can have a "full set" moustache with large sideburns, but no hair on the chin.
In British military parlance, a "full-set" means moustache and side-burns, not a full beard, as in the Royal Navy.
According to Major Rob Yuill, in charge of heritage at The Rifles, this is an important part of keeping up regimental traditions. He told us:
"It’s important to understand where you come from to know where you are, and where you are going in the future."
The answer to the question of where bugle majors come from, meanwhile, lies in the 1800s.
So why do Bugle Majors have mutton chops?Forces News asked Sjt Daniel Lewis: