Surely this must be a typo I never knew voyagers were cleared to run down to the airport.
http://www.nationalrail.co.uk/service_disruptions/currentAndFuture.aspx
Date of this is 02/05/15.
http://www.nationalrail.co.uk/service_disruptions/currentAndFuture.aspx
CrossCountry An hourly service will run to / from Manchester Airport not calling at Wolverhampton and Stafford, journey times will be extended by up to 30 minutes. Buses will run between between Wolverhampton, Stafford and Stoke-on Trent.
Date of this is 02/05/15.