How can I find the restriction code for a particular ticket/journey (or otherwise find the applicable restrictions? More specifically, what restrictions apply to a saver return from Banbury to Longbridge? Does it matter whether I travel with Chiltern or Crosscountry? And (if anyone knows yet) how will this change under the forthcoming fares changes (if this ticket is priced by Crosscountry - is it)? Many thanks for any help, Richard.