npub10u5zhjywf07t75700kmfpl0gdd0ml7ycjh96m980vzwn43q6yc2qrejgm6 (npub10u5…jgm6) npub1g0tuf634rz4suczwj7kgnecr6cyt0eu9xmp3sp0fku68mqehq4msp3tvm4 (npub1g0t…tvm4) The answer is that there's a convention to alternate between each side of the House. Because there were only four Tory questions on the order paper and eleven on the opposition benches, the Speaker allowed seven supplementary questions from the government benches.
This was an excellent opportunity to allow an exception to that convention, but the Speaker is likely gun shy after his recent controversy.