How can you, heading south from Luton AP on an East Midlands Train, avoid the gateline at the MML platforms at St Pancras? It's still not entirely clear whether zone 15* is for all stations Reading - Iver, like how zones 11 and 13 work, or whether it just for the stations not added to the public-facing zones 7-9. For reference: Zone 10: Watford Junction, c2c stations to Grays Zone 11: Broxbourne - Hertford East Zone 12: Shenfield Zone 13: Mertsham - Horley Zone 14: Gatwick I'd imagine Luton AP would be in zone 14, and the other new stations (with the possible exception of Epsom) in zone 13. Same TOC, after all. *Or F in the hexadecimal system, with zones being referred to both ways.