What was the membership of the (a) Council for the Built Environment and (b) six Built Environment Professional Councils for the past five years;
(2) what total number of voluntary associations are registered with the various Councils;
(3) what total number of parallel professional structures exist in competition with the various Councils;
(4) what (a) total number of voluntary associations are registered with the additional structures and (b) is the estimated membership of each specified structure?