SWR» have introduced a new fare type for longer distance journeys on their network to and from London Waterloo.
The fare is called a Semi Flex Return and consists of a 'booked train only' outward portion (break of journey prohibited), with the return portion valid for a month at what are nominally Super Off Peak times (break of journey permitted). These fares are available at varying prices with quotas. They are available to purchase up to 2359 on the day before travel. The return portion validity times are (Mon-Fri):
Not valid on trains timed to depart 04:30-10:59. Additionally, not valid on trains timed to depart:
London Waterloo 16:00-19:00
Vauxhall 16:04-19:03
Clapham Junction 16:07-19:08
Not valid on trains time to arrive at London Terminals or Vauxhall 04:30-11:59.
There's no restriction on return travel on Saturdays, Sundays and Bank Holidays.
SWR have also removed Off Peak Day Returns to/from London Waterloo from stations that now have these Semi Flex Returns. Super Off Peak Day Returns remain.
They've also introduced Anytime Open Returns (OR2). Outward valid on day of purchase, return within one month. No time restrictions. Anytime Returns (SOR outward five day validity, return one month) weren't ever available on SWR/
SWT▸ journeys to/from London Waterloo.
An, example of the new Semi Flex Return:
http://www.brfares.com/#faredetail?orig=TMC&dest=WAT&grpd=1072&rte=442&tkt=XE1