I really cannot see the benefit of HS2 to the airport. There are already five trains an hour to London and three of which take about 75minutes to Euston.Fares are also very reasonable if you pre book. I cannot see a slighly quicker journey making any difference to catchment.
I couldn't agree more. What is the point of spending millions to save 10-20 mins on the journey to London? Plus the fact they will have to build a station further east of the present International station therefore it will take longer to connect to the airport. HS2 to Manchester and Leeds is another matter. There certainly would be a strong case for that, but not for Birmingham.