Originally Posted by
Roger
On the rare occasions that I have done this - er, just the once - only one way tickets were available. I bought:
- a ticket from Boundary Zone 6 to LGW (at Victoria)
- a ticket from LGW to Boundary Zone 6 (at LGW)
They were different prices.

I suspect that the Victoria person was better informed.
Nope, they actually
are different prices, and a period return isn't available. The reason is presumably demand management, same way as a day return on the GX is valid any time if bought from Victoria to Gatwick but only after 0930 if bought from Gatwick to Victoria.