Don't know why Barnsley was choosen but looking on the map my best suggestion is that it's at the C of G of the region?
SSD Appropos to Barnoldswick don't let the good folk of that town hoodwink you that the B in RB211 refers to them
It actually commemorates Bristol as Rolls Royce bought out Bristol Sidderley and their then Vice Chairman was an ex Bristols man
Sir George Cayley
The air is a navigable ocean that laps at everyone door