ill on a train at Baker St

The met among other lines isn't great with communication!!

What Wembley Park meant is that there is an information black hole between Harrow and Wembley, so they cant see the trains. So in essence they were telling the truth! The information probably hadnt made it from the Service Operator, to the station control room, to the platform just yet!

The trains are taken out of service at Harrow or Wembley then help ease out the congestion that is building up into the City. It also means that a train is available to run North to cover gaps with the late running.

Back to information, during a problem like this, general line information will be sent to stations from Service Control staff, this is then put onto a staff voicemail service too. Staff will then prioritise their information flows to places where there are stalled trains, then onto places where people are being detrained (like you) and will obviously know something is up.

Plus other problems will still be occuring on the Met line, Circle and Hammersmith, plus the Chiltern, (not like on the telly, like Spooks! when only one thing happens at a time!) and station staff and trains will be calling up.