Cross Country have now published their very limited timetable for 18 October- https://www.crosscountrytrains.co.uk/media-vnext/3jud3amv/t51-sat-18-oct-v2.pdf
Briefly very limited service will run on the Birmingham to Manchester, Reading/Southampton, Bristol and Leeds/York routes with the odd service to Newcastle and Edinburgh.
No Cross Country service will run on the
Birmingham to Leicester, Cambridge and Stansted Airport, Gloucester to Cardiff, Nottingham to Derby, Bristol to Plymouth/Paignton and Penzance, Edinburgh to Glasgow and Aberdeen and Southampton to Bournemouth routes.
Any services on the affected routes run by other operators will not be affected.
1 November is to follow, but is unlikely to be any better.