I was starting to get excited but I can find no evidence they will run on the St Pancras to Corby line, which is the route that stops at Luton Airport Parkway.
https://www.eastmidlandsrailway.co.u...et-to-be-named
The airport pushed for 4 trains an hour, as part of the EMR franchise agreement, but ended up with 2, which is still better than one. The whole experience now though is very disappointing compared to the old rolling stock and is a major downgrade. The airport will be able to claim a 30 minute journey time between terminal and London via the Dart so it will look good on paper but I feel EMR want to discourage airport passengers from London in using the service by providing no luggage space.