I will be travelling tomorrow from Huddersfield to Brighton, returning on Friday, using a super off peak return at £126. I believe this allows me to travel either via Manchester or Leeds. The restriction on the return portion of this ticket is that I can't leave Kings Cross before 18:15, or Euston before 18:45. This means the journey planners put the 1649 from Brighton to Victoria as my first available train (other than the slow one to St Pancras). Am I right to think I can leave Brighton any time I like, then spend time in London before getting a train after 18:15? If so, will I get any grief from RPIs or barriers? Thanks all.