Full details in the TfL press release at:
http://www.tfl.gov.uk/tfl/press-cent...s-releases-con
tent.asp?prID=398

The release also says:

"Customers can still travel between Central London and Heathrow on the
Underground via the Central line to Ealing Broadway then the District line
shuttle to Acton Town which will operate at a frequency of three trains
per hour and then the Piccadilly line to Heathrow Terminals 123"

Well, that's great. However, given that it takes 6 minutes for a train to
fo from Ealing Broadway to Acton Town, how on earth does the shuttle work
out at 3 tph? Even if it was worked by just one train, taking 6 minutes
either way and having a 3-minute rest, that's 4 tph!

Only 1.5 mins turnaround at each end, for the entire day, would be a
bit hectic...

Of course, they could always just use 2 trains, and actually provide a
decent frequency. 3tph just doesn't cut it. It's a slap in the face
considering the "customers" are already being highly inconvenienced by
the closures.