The memorandum on page 2 of PDF(A) fell out when I opened the WTT, I copied it in just for general interest.
Routes covered:
A) Swindon to Severn Tunnel Junction & Weston-Super-Mare.
B) Highworth Branch.
C) Malmesbury Branch.
D) Pilning Junction to Avonmouth Docks.
E) Calne Branch.
F) Bristol to Clifton Down, Hotwells, Avonmouth Docks & Filton.
G) Bristol to Radstock & Frome.
H) Camerton Branch.
I) Portishead Branch.
J) Witham to Wells & Yatton.
K) Wrington Vale Branch.
L) Clevedon Branch.
M) - Pages & Pages of Technical Data - Bristol Midland Transfer Trains, Alteration of Trains Notice, Marshalling Instructions, Station Trucks, Speed Restrictions, Signal Box Opening Times, etc.