In March, insulation measure installations under the Great British Insulation Scheme increased by 14% compared to the previous month.
The Department for Energy Security and Net Zero has released this month’s figures from the Great British Insulation Scheme report. The statistics reveal that in March 2025, 6.5k measures were installed in 4.9k British households. Since the start of the scheme (March 2023), nearly 77k measures have been installed in over 60k households.
The Great British Insulation Scheme (GBIS) is a government initiative which aims to boost energy efficiency and reduce household energy bills by improving home insulation. The scheme targets two eligibility groups: low-income households and houses within certain council tax classifications.
Cavity wall insulation continues to be the most common measure installed, accounting for 41% (31.5k) of the total of measures. This was followed by loft insulation (28%) and heating controls (21%).
The data team at Polimapper has visualised GBIS statistics by Westminster constituency in Great Britain, revealing the highest regional delivery of measure installations was in the North West (16%).
Since the launch of the scheme, the constituency of Redcar has received the highest number of installations, at 825 measures, a rate of 1,956 measures per 100k households. This was followed by Leicester East (767) and Gainsborough (734).
By comparison, London constituencies registered considerably fewer insulation measures, with the constituencies of Holborn and St. Pancras, Islington South and Finsbury, and Kensington and Bayswater recording zero measures per 100k households. Explore statistics in your area below.
About this map
The map below shows GBIS installation statistics by Westminster constituency in Great Britain.
To view figures in your area double click on the map or click here to launch the full page version.
Geodata context
This month’s GBIS figures follow scrutiny of Labour’s pledge to invest an additional £6.6 billion in home insulation. Ahead of last year’s general election, Starmer pledged to invest in improving energy efficiency in British homes, under the “Warm Homes Plan”.
However, Whitehall officials have since said that ministers had been assessing whether they could trim the scheme and Treasury has declined to confirm whether the government will stick to its commitment.
On Monday, in a joint letter to Rt Hon Darren Jones, Chief Secretary, over 50 companies and trade bodies called on government to honour their manifesto commitment to invest in the Warm Homes Plan.
The letter signed by organisations of the likes of Nationwide, Building Society Association, Heat Pump Federation and Solaris reads: “Limiting investment to the amount allocated in the Autumn budget at the June spending review will result in the loss of 3,000 skilled, future proof roles. Meanwhile, the £13.2bn allocation is an opportunity to add 12,000 new skilled roles to the retrofit workforce this Parliament.”
James Dyson, senior researcher at E3G: “Fulfilling the manifesto pledge to invest £13.2bn in home energy efficiency is the most productive infrastructure investment this government can make, creating jobs and boosting growth in every part of the country.”