Gatwick Express validity on "Not Valid on HS1" ticket

[JamesRowden]

That would be quite some upgrade required 19tph over the 2 track Ouse viaduct/ Balcombe tunnel section? Perhaps ATO with a future Govia franchise struggling with the introduction of No Driver Operation? Or a BML2/ HS4 scheme?

The interventions suggested in the Route Study for after CP5 are:

• ETCS ATO
  
• London Victoria
  Connect Platform 8 to Sussex side, Brighton Reversible, bi-directional Up Fast
  
• Windmill Bridge Jn
  Fast Lines grade separation & 6th track to East Croydon
  
• East Croydon
  Additional platforms
  
• Stoats Nest Jn
  Grade separation
  
• Redhill (not required if none of the London Victoria to Haywards Heath services run via Redhill)
  Additional infrastructure, remodel country end
  
• Reigate (not required if none of the London Victoria to Haywards Heath services run via Redhill)
  12-car bay platform and Platform 2
  
• Gatwick Airport
  Additional/reconfigured crossovers
  
• Haywards Heath
  Additional crossovers
  
• Keymer Jn/Wivelsfield
  Additional up platform & grade separation
  
• Hove
  Upgrade turnback siding