This survey is part of the Institute of Education‘s work for The Royal Society project “Vision for Science and Mathematics Education 5-19”. A quote:
The Royal Society’s objectives include support for the development of a world class education system in science and mathematics as a contribution both to research and to UK economic competitiveness. The current research is aimed at helping to redress identified shortcomings in current provision relating to teachers and the science and mathematics workforce, leadership and ethos within schools and colleges, infrastructure and accountability.
What surprises me is that such issues as subject knowledge and mathematical competence of mathematics teachers are not even mentioned in the survey. Look at relevant questions in the survey — they do not mention that!