Heathrow Express train to Paddington, then follow
directions from Paddington. Very quick as far as
Paddington but then can be rather slow from there onwards. Slightly quicker
than the direct Underground, usually, but not much. The Heathrow Express trains
are outside the Travelcard scheme and are very much more expensive than any
other route. Heathrow Connect trains take a little longer, at lower fares.