Airwave is plug and play and as I understand fitted last month, FLiR has been inbound from SARF/MoD for the last three years awaiting imminent fit, so that just leaves the "bigger" fuel tanks? (an extra 600lbs?)
I think they could fit a full size tank in the sonar well, instead of the "C" shaped one at present.
So the RN and RAF have "similar" capabilities. No?