Off Peak Return (SVR) tickets to Hanborough and beyond are valid on all services from London and Reading. It is the Off Peak Day (CDS▸ /CDR▸ ) and 1st Class Off Peak Return (FSR▸ ) that are barred between 1600 and 1915.
EDIT: Having said that, regarding the SVR..... yet again NFM▸ 06 and certain Online Journey Planners disagree. Avantix▸ WebTIS based sites (East Coast, London Midland, redspottedhanky.com) bar use of the SVR to Cotswold Line stations on the 1750 and 1822, potentially overcharging passengers by nearly ^20.
Revisiting this issue, I notice that retailers using Avantix WebTIS are
still barring bookings using the SVR on the 1750 and 1822. I've checked post 5th September as well to see whether the update would coincide with the new NFM, but no. I know Cotswold Line regulars are aware that they can return on the (scheduled!!)
HSTs▸ at 1750 and 1822, it's the irregular travellers that may be overcharged.
Despite a call to East Coast Web Support and an email to
ATOC» (for which I recieved no reply) nothing has been changed.