Apologies if this has already been covered, but I can’t seem to find anything definitive about the Heathrow Free Travel Zone. I’m staying at the LHR Marriott. (I’m arriving at T3.) Pre covid you could take the bus there. Is it still in operation (assuming from the central bus station), and if so, is there a charge? If not then is my best option to take the Hoppa to the Sheraton and walk to the Marriott? I have an Oyster card if that makes any difference, although Ive bern told that contactless payment has expanded since my last 2019 visit. Thanks in advance.