BR1948 - 1968 by Chris Leigh. As pictures.
Modelling the LMSR, Chris Ellis (Softback 1985)
Modelling BR Today, BR 1948-1968 & GWR Softback Bundle X3 Ian Allan
MODELLING BR CL 01-40 42 44-46 47 50 52 55 56 58 73-77 81-87 HST APT LOCOs BOOK
MODELLING BR '70-90s DIESEL & ELECTRIC LOCOs ROLLING STOCK & INFRASTRUCTURE BOOK
Modelling Narrow Gauge Railways in Small Scales Chris Ford