Brown coaches with coloured stripes

[whiteoak]

I'm seeking clarification on the use of red or blue coloured stripes on brown coaches (steam hauled trains) - Its been suggested that the colours are for class designations .....Your thoughts please

 

Thanks

 

Kelvin White

 

Ashendon

[VJM]

Blue denotes second class (RO) and red denotes third class (HA).