The Scottish Bus Group (SBG) was a state-owned group of bus operators covering the whole of mainland Scotland.
The origin of the grouping was the operators owned by and including the Scottish Motor Traction company, which were transferred to Scottish Omnibuses after nationalisation in 1948 under control of the British Transport Commission. Highland Omnibuses was added to the group in 1952.
A new holding company, Scottish Omnibuses Group (Holdings) was formed in 1961, and this was renamed Scottish Bus Group[1] in 1963. Meanwhile, the group had come under control of the Transport Holding Company in 1962 when the British Transport Commission was wound up. It went on to become part of the Scottish Transport Group on 1 January 1969 along with David MacBrayne. At the time it operated 4,700 buses.[2]