In my case
London chc requested medical - 14/06/2010
I did medical - london - 20/06/2010
my medical thay resevided - 24/06/2010
my wife did medical (india)- 30/06/2010
her medical resvided - 07/07/2010
we resevided e.mail for passport stamoing today -17/12/2010
might be this infromation help to you