They no-longer operate MML which the BBC should know as they reported on EMT winning the franchise on many occasions.The group, which also operates the Gatwick and Stansted Express and the inter-city services between Yorkshire, the east Midlands and London through Midland Mainline, has pledged a new fleet of extra trains by the end of 2010 - delivering 14,000 extra seats a day.
I don't remember any promises of new stock either, only refurbished MK3's and 90's.
Oh well, the first NXEC liveried train will be the 9:30 Edinburgh - London KX so if you're nearby can go check the livery out first hand.
Cheers,
Ali