As a Barnham guard now driver here goes...
The depot is the upper floor above the CO-OP across the road and was the result of a merge of Bognor, Littlehampton and West Worthing depots around mid 90's I believe. We currently have approximately 120 guards and 135 drivers. Drivers are spread over the following
Shunt driver link. Three drivers who do shunt turns only at Bognor and Littlehampton
Relief link has now been absorbed into Link 4 which sign Portsmouth - Brighton, Arun Valley and BML to Gatwick, Littlehampton and Bognor branches plus associated sidings, yards and depots (not Fratton yard obviously)
Link 3 sign the above plus Victoria
Link 2 sign the above plus London Bridge and Streatham Hill (not from Balham)
Link 1 sign the above plus Southampton via Netley and Eastleigh and minus Lovers Walk (possibly Streatham Hill)
DI link sign all minus Eastleigh.
We all sign 313's and 377's with Link 2 and DI link signing 442's
Guards links 3/4 sign Portsmouth - Brighton, Bognor, Littlehampton and Victoria/London Bridge via Arun Valley/BML with links 1/2 signing Southampton via Netley/Eastleigh as extra. No guards sign 442's.
The three units berthed in P1 make 04:48 to Brighton and 04:35 (ish) empties to Havant (8 car) this sometimes makes an additional ghost train run at 03:30 if it's a bit chilly out.