At the Bradford Industrial Museum. It's a 1946 Karrier 'K' with 'utility' body. Used right up until the end of trolleybus operation in Bradford in 1972. There are many more Bradford trolleybuses in my Sandtoft Trolleybus Museum gallery: Home>Trains, Trams and Buses>Sandtoft and in my Keighley Bus Museum gallery too.
From Bradford Industrial Museum