The car line diagrams have all been reprinted a few times, once for the opening of TfL Rail, and once for the service branded as “Elizabeth line,” similarly the overlays at stations are all completely new and include the Heathrow Airport tag, so it is not a leftover.Ignoring the fact that TfL is National Rail, could it just be that the “Trains to Heathrow” flag at Ealing simply remains there from when TfL Rail was added to Ealing in 2018? They might well remove it on future prints now that it has the same connections as the rest of XR.