I used to love sitting on the floor of my Dad's workshop in Shoreditch looking up out of the window at the trolley bus overhead rails sparking as the buses went into the Shoreditch Church crossroads. They were replaced in 1961 according to this website.
John M. J.
FAREWELL TO No.1669
Charlton staff bid farewell as number 1669 - the last trolleybus to be overhauled at the workshops there - leaves for its final spell in service before the completion of the conversion scheme. A tram and trolleybus repair centre for more than 40 years, Charlton is to close shortly.
(No.1669 was the last in the N2 class of 25 trolleybuses first delivered in June 1940. They were numbered from 1645 to 1669 [ FXH 645-669 ], with chassis by AEC and bodywork by Park Royal)