On capability gaps, the MQ-9 Reaper and the MQ-9B Protector can offer both Synthetic Aperture Radar (SAR) and Ground Moving Target Indication (GMTI) with its Lynx multimode radar. Here is some info:
https://www.ga-asi.com/lynx-multi-mode-radar
Now the Lynx is not as powerful as the Sentinel’s radar, but there are many more Protectors on order than we have Sentinels - so in this case quantity gives a quality better than before. Further the fidelity of the data from Protector is superior as it is closer to the area being surveilled. It can also deliver product beyond line of sight - indeed from anywhere on the planet with the right satellite coverage and bandwidth (which there is).
So the RAF retains a SAR/GMTI capability with the 20+ Protectors on order. So all is not lost when it comes to capability - the Reapers already being flown offer that capability now, but in smaller numbers.
