Disclaimer: Still don't own

"Really John? A battle re-enactment?"

"Well, not exactly – Greg's asked us to take part in a charity display of English Civil War fighting. It's for a good cause."

Sherlock rolled his eyes.

"Do we have to wear silly costumes?"

"17th century uniforms, yes. Breeches, doublets, buffcoats…"

"No John, absolutely not. I refuse to…"

"Take the field opposite Anderson and Donovan? They will be on the Parliament team. Greg wants us for the Royalist army."

"Weapons?" Suddenly, the dark haired detective was interested. "Swords?"

"No, just muskets." John grinned. "Big heavy muskets, with a hefty brass plate on the base.

"Maybe it's not such a bad idea after all. Do I get to be an officer?"

"No, you poncy git, Greg's our officer, you get to play a grunt."

That thought brought a pout to Sherlock's pale features, which made John's grin widen.

"Just remember, as a grunt you get to square up to Anderson's very ugly face as you go in for hand to hand combat."

"Maybe I can get my musket and twat him over the head with it?"

John choked on a laugh.

"I think that may be frowned upon." He said

"Yeah - but his frown will be upon the butt end of my musket... and I'll just wipe it off with a soft cloth and some brasso"

A/N: Grunt. Any non-commissioned soldier.
Brasso. Branded brass cleaner