BBC Northern Ireland documentary, 1956

A look at the railways in Northern Island also features some bus content.
Belfast trolleybuses:

Northern Ireland Road Transport Board A844 (GZ6072), a Leyland Tiger PS1/NIRTB new in 1947, and a similar vehicle seen from behind:

Ulster Transport Authority G8962 (OZ835), a 1953 Leyland Royal Tiger PS1/11 with UTA body:

UTA E8954 (OZ827), a 1951 Leyland Royal Tiger PS1/11 with UTA body:

Great Northern Railway converted a number of assorted motorbuses as railbuses; this was no. 2:

The UTA had two of these observation coaches built in 1948. This is B8940 (GZ7708), a Leyland PS2/10 with UTA body. It and E8941 (GZ7709) were rebuilt as PD2/10c double-deckers in 1958: