Heathrow is zone 6. Most of the time, I"ll be in zone 1, I assume. If i get a 7 day travel card/Oyster card....and want to be able to travel before 9:30a.....what's the best combo? Just buy Heathrow inbound (to Kensington) and then a 7 day Oyster for zone 1? A 7 day Oyster for zones 1-6 is more expensive than I need, from what I can tell.
Cheers!