They consisted of four carriages - a second class driving trailer , a second class trailer , a second class motor car -LRB- with guard 's / luggage compartment above which the Stone Faiveley AMBR pantograph was mounted -RRB- and a composite -LRB- 1st and 2nd class -RRB- driving trailer .

They consisted of four carriages - a second class driving trailer , a second class trailer , a second class motor car -LRB- with guard 's / luggage compartment above which the pantograph was mounted -RRB- and a composite -LRB- 1st and 2nd class -RRB- driving trailer .
