Thanks Mike.
Watford High Street works.
Can I double check that it’s valid to start and return to Chalfont & Latimer?
It also has a different Restriction code.
Chalfont has a B1 code which says that it can’t be used before 0930
Watford has a B2 code which says it can’t be used before 0915
Does that mean I can use the Watford ticket at Chalfont after 0915, or should I wait until 0930?