Question about using the 2 halves of a return for travel in the same direction. IIRC, the tickets used not to show a direction, although I may be wrong about that. I also have an idea that one used to only get one code for an R/T ticket, although again I may not be remembering correctly.

I recently bought an R/T ticket with two codes / barcodes, and the printed version of the ticket says next to each Pad-LHR or LHR-Pad. I know in the past that one could use tickets in both directions. Is that still the same with both halves of an R/T?

To answer my own question, having consulted the HEX website. i was not aware of this change, so maybe others weren't either

"Can I use my ticket in either direction?
As of 2 May 2018 we have changed some of the terms and conditions to our tickets:
For tickets purchased on or after 2 May 2018
You will not be able to use tickets in either direction. Tickets must be used for the direction they were booked. For example, a ticket from Paddington to Heathrow cannot be used for travel from Heathrow to Paddington.
For tickets purchased before 2 May 2018
You will be able to use these in either direction regardless of the direction chosen when purchased."