There are some other weekday (Southern) trains with pretty weird calling patterns in that area. It's usually a way of managing both line capacity (especially the time spent braking for/accelerating from platforms) and capacity of the available stock on the relevant diagrams. Take a look at these!
http://www.realtimetrains.co.uk/train/W60303/2014/06/12/advanced
http://www.realtimetrains.co.uk/train/W60494/2014/06/12/advanced
I knew about the Seaford and Hastings but not the evening one. Interestingly their use to be regular services between Seaford and Haywards Heath all day long.
South West Trains on their mainline don't do nearly as many odd stopping patterns. Although thinking about it I can think of a few. More likely to get services that miss out stations, which they would regularly stop at during the day on X service, rather than add them in.
Back in topic I the new franchise adopts journey check solution and it's really helpful as a traveller.
I wonder if there be less or more services from Haywards Heath and stations south that travel via Redhill in the new franchise? I noticed this morning that from Haywards Heath there was a 6.30 to Luton via Redhill; a 6.35 to London Victoria via Redhill and a 6.45 to Bedford via Redhill, with no service in between via the quarry line. Most of the day no trains run via Redhill, with passengers having to change at Gatwick. On Sundays there is a regular hourly service.
Such a service is useful for passengers going towards Reading or Tonbridge. You can change at Gatwick Airport for Reading services but the minimum connection time is 10 minute, where as at Redhill it's a more reasonable 5 minutes.
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