To ask the Secretary of State for Energy, pursuant to his answer of 5 June, Official Report, column 409, (a) who estimated that 5·5 TWh of electricity could be saved, (b) whether this estimate has been published, (c) which insulation measures were included and (d) what other estimates made during the last two years on potential savings from better insulation are known to his Department.

The estimate was derived from a publication by the Building Research Establishment (BRE) entitled "Energy Use in Buildings and Carbon Dioxide Emissions"—BR 170 HMSO ISBN 085125 4365, £25. It is estimated in table 11 at page 36 that cost-effective insulation measures applied to houses in the United Kingdom would save 23·3 PJ of electricity corresponding to 6·5 TWh. The figure has been scaled down to 5·5 TWh to cover England and Wales only.The recommended cost-effective insulation measures covered all existing houses and assumed that:

To ask the Secretary of State for Energy what was the number of community insulation projects and the number of participant workers and trainees at end-year in 1987, 1988 and 1989 and at the latest available date for each region, Wales, Scotland and Great Britain as a whole.

The figures requested in respect of 1987 and 1989 are as follows:

Number of draughtproofing jobs completed
	1987	1989
East Midlands	10,236	10,245
London	7,839	1,353
North East	13,867	9,983
North West	16,125	22,230
Scotland	30,349	37,154
South East	6,728	4,942
South West	9,489	4,368
Wales	15,017	13,371
West Midlands	11,957	12,051
Yorkshire and Humberside	17,100	15,186
Total	138,707	130,883

Neighbourhood Energy Action advises that equivalent information in respect of 1988 is not available, and that reliable information in respect of early months of 1990 for comparison with the same periods in previous years is not yet available.

To ask the Secretary of State for Energy what was the number of draughtproofing jobs completed so far in the current year and completed in the equivalent periods of 1987, 1988 and 1989 for each region, Wales, Scotland and Great Britain as a whole; and what were the full-year figures for 1987, 1988 and 1989.

Available information in respect of the last three complete years is as follows:

Number of operating projects at period end
	1987	1988	1989
East Midlands	36	25	28
London	34	8	14
North East	25	17	18
North West	48	41	45
Scotland	66	30	77
South East	47	21	23
South West	34	15	16
Wales	47	27	36
West Midlands	50	22	26
Yorkshire and Humberside	34	22	24
Total	421	228	307

Number of participating workers/trainees at period end
	1987	1989
East Midlands	505	271
London	617	31
North East	493	253
North West	1,051	672
Scotland	978	780
South East	566	116
South West	534	190
Wales	1,047	335
West Midlands	775	314
Yorkshire and Humberside	679	353
Total	7,245	3,315

Neighbourhood Energy Action advises that information on numbers of participating workers/trainees at end 1988 is not available, and that reliable information in respect of the early months of 1990 for comparison with the same period in previous years is not yet available.

To ask the Secretary of State for Energy (1) what was the spending on the community insulation programme in each year from 1983–84 and including estimated spending in 1989–90 for (a) the London borough of Camden and (b) the London borough of Islington;(2) what was the number of community insulation projects and the number of participant workers and trainees at end-year 1987, 1988 and 1989 and at the latest available date for

There are no community insulation projects currently operating in the London boroughs of Camden and Islington. Detailed information on projects under the community programme which served those areas prior to 1988 is not available.