Well, not so much a revision (to actual fares), but there will be hundreds of new journeys available to and from Heathrow NR from Sunday 20th May 2018. That is when the Heathrow Connect operation is transferred to TfL-Rail. As already mentioned, Heathrow NR will be in zone 6, but single fares to and from the airport will carry a premium. Oyster and Contactless will NOT be available on Heathrow Express until later in the year.
The premium fares mean that I’ll be adding another column to the fares guide pages. Although the new fares were publicised in a press release in March, there was no mention of fares to West London destinations in zones 3-6 via Ealing Broadway. Watch this space in the early part of next week.