Changes

'''Carriage type BG (Brake Gangwayed) ''' designates a carriage with a Guard's compartment and other storage space. The carriage has no passenger seating, although a gangway allows passengers to pass through it. Following the introduction of TOPS in the late 1960s, BR carriages of this class were allocated the [[TOPS code]] '''NAV''', denoting: N: Non-passenger carrying stock<br>A: Gangwayed brake<br>V: Vacuum brake