Think it can go further than that…
1. close Epsom downs, low patronage, 1 station is less than a mile from Sutton, the next is in a low population area. Current service is poor and in event of issue its the first Southern cuts
2. close Caterham branch, it runs parallel to the oxted line, some stations are just few steps apart.
3. close Purley Oaks, Coulsdon south,Merstham, all are very close duplications and with minutes drive of alternatives
4. close the Quarry lines, as now theres a fast route from east croydon.
5. Stop Victoria - Reigate, no longer needed.
6. destaff stations between Clapham and East & West Croydon, leave Balham, Epsom and Sutton but destaff the others, same on BML between East Croydon and the South, except East Grinstead, Redhill and Gatwick.
7. cease Redhil to Tonbridge (lightly loaded), cease the daily ECS to London Bridge.. diversions are unicorns, they rarely happen.
8. cease GWR past Redhill, and cease the Brighton workings
9. Turnover WoE to GWR and terminate at Reading, cutting out Waterloo, and Reading-Basingstoke shuttle.
10. consider closing stations within a 7/8 minute drive to other stations where adequate parking exists in a post covid world.
11. cut Thameslink to Sutton, put Sutton-Wimbledon to tram, consider the same for West Croydon to Sutton. Possibly close Epsom to Sutton, and divert London Bridge via Wimbledon, tooting, making Sutton a terminus.
12. cut XC from Bournemouth to Reading.
13. cut XC from Cornwall to Birmingham.
14. close Battersea Park, Queenstown road
15. cut network rail services off the District line from Wimbledon to Putney
16. cut west ealing to Greenford, to tube.
17. cut bourne end to marlow.
18. cut slough to windsor
19. consider closing Fenchurch St, Cannon St, Moorgate (Rail).
20. long term close Marylebone, divert to Old Oak.
21. Destaff tfl rail stations, except the terminators, and tube interchanges.