Sketches done on site are often hard to follow. Normally, I'd make a fair copy when I returned home. So far, I've not found a better copy, so here is the original version, believed to date from the 1960s.
Click on any sketch to enlarge.
CP - 'Catch Point' (Trap points with a switch in both rails)
CR - 'Catch Rail' (Trap points with a switch in the outer rail)
TP - 'Tubular Peculiar' Tubular post signal of Southern Region pattern
WC - Water Column
T - 'Triple Lead' (Tandem Turnout)
L, Latt - Lattice Post signal
LS - Loco Shed
SB - Signal Box
For details of what remained in 2005 (a single platform at what has become the end of the branch, with a siding and run-round loop), refer to 'Railway Track Diagrams' Book 3: Western', Fourth Edition, published by Trackmaps (ISBN: 0-9549866-1-X). The First Edition of this book was published by Quail in 1989.