According to the Northern Scot flight trials of the MRA4 have swallowing up about 50% of the entire spend!
The majority of the overspend has come about during the flight trials process, which has highlighted the need for modifications. There are problems with the pitch of the aircraft – something which the MoD says is not unusual – and that has accounted for about half the cost growth.
Source:
http://www.northern-scot.co.uk/news/...mrod'.html