Some interesting info I've found
Units have always stabled in Moorgate overnight & at weekends, as there was not have enough room at Bedford CS for them all to stable there.
Units now stable as follows:-
Brighton (Pfm 5) 3
Preston Park Sidings 3
Selhurst Depot 13
Blackfriars (Pfm1/2) 4
Moorgate (Pfm 6) 1
Cauldwell Depot 11
Bedford C S 30 (in 14 sidings) First 8 car departs before the last 8 car arrives at 0230
Bedford North Sdg 2
Total units diagrammed 67
When there were 4 x 317 diagrams working on TL a 2x317 stabled in Moorgate along with a 2x319/3 and the other 2x317 stabled at Luton Crescent Sidings.
All these units were all spare over the weekends.
Now Cauldwell depot is open one unit still stables at Moorgate in Platform 6 every night of the week, and is spare over the weekend. So you will always see a 1x4 319/3 in Moorgate over the weekend.
Extract of the Diagrams are as listed below:-
SU848 SX 319/3
BEDFORD C.S 22+12 5A04
BEDFORD 22+14 22+20 5A04
FARRINGTON 23+04 23+04 5A04
MOORGATE (Pfm 6) 23+12 STABLED
SU849 SX 319/3
MOORGATE (Pfm 6) 06+52 5K21
ST ALBANS CITY 07+20 07+21 5K21
ST ALBANS CITY CENTRE SIDINGS 07+22 07+41 5K21
ST ALBANS CITY 07+42 07.44 2O21
FARRINGDON 08.15 08.16 2O21
Hope you find the helpful