(2) how many planning applications for zero carbon homes have been made in each Government office region in each of the last 12 quarters;
(3) how many zero carbon homes have been (a) started and (b) completed in each of the last three years;
While information is collected centrally on housing planning permissions, starts and completions, this does not separately identify zero carbon homes. Furthermore there is no requirement for local planning authorities to keep records which separately identify zero carbon homes.