Aglians wrote:
Just to clarify: if you are travelling from Heathrow to Zone 1 AND
making other tube journeys in Zone 1 on the same day, you need only
a Zones 1-6 Off-Peak Day Travelcard which costs £5.40 after 09:30.

I think it is enough a Zones 2-6 single ticket + Zone 1 day
travelcard (if journey is in off peak).
Am I wrong?

There is no Travelcard for Zone 1 only. A Zone 3-6 single ticket and a
Zone 1-2 Travelcard would cost £2.20 + £4.30 = £6.50. It's cheaper and
easier to buy a Zones 1-6 Travelcard (£5.40 off-peak).
--
Richard J.
(to e-mail me, swap uk and yon in address)