They have an awfully long turnaround time at Blackwater, sticking to the timetable but missing out the to/from Reading part. I assume its partly to do with pathing through Guildford, though a re-written timetable could get you an hourly Blackwater to Gatwick using 3 units
I think they are using three units - it's roughly an hour each way before adding dwells. For once
GWR▸ 's words are more accurate than mine:
GWR is operating a revised hourly local stopping train service between Blackwater and Redhill.
(At least that bit is - the other words are still misleading; e.g. saying the buses run to Guidford.)
So they are using their usual paths for the stopping trains, fitting into their usual gaps at Ash-Guidford and Reigate-Redhill. After about 20:00 tonight they run to Gatwick, again in the usual paths - but that's roughly when the Redhill trains stop running normally. I'm not sure if they want the extra layover time at Blackwater, that being "home from home". While it may help to cover for travelling delays on crew changes, crews who are not changing over might not enjoy almost an hour of "time off" at Blackwater.
When I looked at lunchtime, the afternoon's schedule was showing alternate trains running semifast and extended to Gatwick. I'm not sure if that was ever going to work, but it's been removed anyway. Someone thing aloud on paper (or on
TRUST▸ ) perhaps?
Having to change at Redhill is a disadvantage, but only for passengers from Guidford and the other stops on the semifasts from Blackwater. From minor stops you always needed to change, and from Reading-Wokingham you'd be better off using an alternative route by train than the (rather slow) buses. I found one of GWR's instant posters at Wokingham, complete with pretty coloured map showing all the options.
The words don't actually mention routes you can use a "via Gomshall" ticket on specifically, just "valid tickets can be used on alternative routes via Ascot or Basingstoke". The route diagram shows alternative routes are available via Paddington-Victoria, Basingstoke-Farnborough Main, Ascot-Aldershot for Ash Vale and Ash/Wanborough, and "To London Waterloo Change and Clapham Junction for trains to Gatwick Airport".
That's "valid" in what sense, I wonder? Surely they don't just mean tickets normally valid for those routes? GWR JourneyCheck still says:
South Western Railway are conveying passengers via any reasonable route until further notice. Arrangements have been made for Great Western Railway rail tickets to be accepted for these journeys. If you are travelling between Reading and Wokingham you are advised to travel with South Western Railway.
South Western Railway are conveying passengers between Reading and Farnborough or Guildford via Basingstoke to connect with GWR train services, also between London Waterloo and Dorking to connect with GWR services at Dorking Deepdene.
Southern Railway are conveying passengers between London Victoria and Gatwick Airport via Redhill in both directions until further notice. Arrangements have been made for Great Western Railway rail tickets to be accepted for these journeys. Travelling from Reading to or from Redhill and Gatwick Airport, you are advised to travel via London Paddington and London Victoria.
London Underground are conveying passengers between London Paddington and London Victoria via London Waterloo in both directions until further notice. Arrangements have been made for Great Western Railway rail tickets to be accepted for these journeys.
So that does explicitly say "GWR tickets" are being accepted via Basingstoke, but still refuses to say that for travel via Clapham.