W. Howard Baker’s Storm Over Rockall, the third of the six Danger Man TV tie-in novels. It's an original novel but with similarities to the TV episode Not So Jolly Roger. Someone is sabotaging a British rocket program. It could the Russians, or it could be the Americans.
My review: https://cult-tv-lounge.blogspot.com/2021/02/danger-man-storm-over-rockall-tv-tie-in.html