There is no train connectivity apart from central London.
Yes, I know there are at present flights from MAN to LHR, but for how long they will continue is another matter. Before Xmas (within 6 weeks) the HS2 Phase 2 consultation will begin with a HSR line between central Manchester and a new railway station outside of T5 on the Agenda. .
This is a link to Hansard for Monday 29th October 2012
House of Commons Hansard Written Answers for 29 Oct 2012 (pt 0001) and scroll down to "High Speed 2 Railway Line" to read the proposals.
It is well believed that the dinosaurs died out because they were unable to adapt to the developing planet !