Not bad considering the level of classification the author has access to (ie none) and to be fair the
“Part of the problem was lack of experience in fighter radars in Britain”
Refers to 1983, I think, when FRS1 was operational, but was very different and very limited in its own ways, FRS2 was probably a paper requirement (I'm sure someone knows exactly!) ECR90 was a dream and Merlin wasnt even that!
Overall a good stab. Wouldn't use it for a tech lecture though!