Björn Forslund kindly sent in these pictures from Finland.  He says Leyland and AEC were quite common in Finland after the war and for some decades further. Finnish manufacturers Sisu and Vanaja also used Leyland and AEC engines in their chassis. 

This is a Leyland Leopard with Lahti body (this bus belongs to a private collector). © Björn Forslund

Preserved at the Finnish Museum Mobilia (in storage) is this AEC Regal Mk III with Valmet body from 1950 (in service until 1971). To the left is a British Thomson-Houston trolleybus, with Valmet body, from 1949 (in service to 1976, when trolleybus operation ceased in Tampere). Both buses belonging to the traffic company of Tampere. © Björn Forslund