Although it looks as if there were some delays in the original programme due to the EC145s of the Met the current delay is as stated above role equipment.
I made some enquiries in Paris to try and clarify the situation and it seems that the missing item is a low light camera.
The original supplier [ITT] got into some mess with the US authorities over some export irregularities last year and have been fined heavily and banned from exports since as a 'punishment'. Many of you will be aware that the US is 'hot' on export sales of some items [including FLIR] even to its 'friends' and as a result there is a scramble to finalise a deal with an alternate [non-US] source.
So if you are in the USA you can have one with the original ITT camera off the shelf [and to 'prove' the worth of the system I understand there are dozens in service] but not if you are one of Mr Blair's countrymen...
The aircraft systems are therefore effectively untried. One option is to deliver the airframe 'as is' but neither party would want to deliver or take an aircraft where there were likely to be major outstanding integration issues.
Meanwhile the customer for EMAS will have to wait a little longer.