While the vehicles appeared externally similar to Class 127 vehicles, internally they had improved seating, furnishings, lighting and wall surfaces, due to the work of the BTC Design Panel who wanted to remove the bus type atmosphere from the sets. Over the years the sets had a variety of buffers, including cut, oval and large round. In 1981 some power cars were fitted with power sanders to aid adhesion.

	This first view of a second class has an unpatterned moquette (the scan has added the dots).
	This view of second class has moquette as used on the Class 126 Swindon units built for Ayrshire.
	This is the first class.