Carlisle Works was formed in 1920 and extended in 1924. It was in Carlisle Road, Edgbaston. It dealt principally with the body of buses whereas Bearwood, it seems, were more into the mechanics. In 1954. the year of the 'Reds' Golden Jubilee a new complex was built and named the Central Works, but was still affectionately known as 'Carlisle'.
The Birmingham & Midland Motor Omnibus Company aka Midland Red, started out in 1904. It had a great history holding a unique place in the Uk's bus industry. In fact both the BCT and Midland Red, for different reasons, were the most progressive, outside London, of bus operators.
I must add here that my interest in BCT ends when the WMPTE took over all the West Midland municipal buses and part of the Midland Red. As for the Midland Red it was even less appealing (as was my local Devon General and Western & Southern National buses) when the National Bus Company stepped in in 1969. I have little interest in the split up of the remainder in 1981.