When the trolley-bus poles came off the wires

SIR – I well remember, as a child in east London in the postwar years, sitting patiently while the trolleybus driver (Letters, 29 November) left his cab and used a huge pole to reconnect the conductor poles to the cables. We all thought it great fun, but imagine the traffic queues nowadays if this were to happen. Marie Blanchard

Newport, Monmouthshire SIR – The days of buses emitting clouds of fumes are long gone, as all modern public-service vehicles have to be fitted with Euro Vi-compliant engines.

Nottingham is now running its entire park-and-ride services using battery-powered vehicles, and these can operate all day on an overnight charge. John Bowden

Chellaston, Derbyshire