The annual number of energy efficiency measures installed in UK homes will decrease to 1.6 million in 2020.

That’s a 73% drop since 2012, a report from the Association for the Conservation of Energy (ACE) stated.

It analysed the energy efficiency measures installed, the number of households helped and the total investment during the last Parliament and estimates what will be achieved at the end of the current one in the next five years.

ACE expects the number of households installing efficient measures to reduce to 1.2 million during the same period – a 76% fall since 2012.

The total investment declined by 53% to £0.7 billion between 2012 and 2015.

It is expected to reduced by  53% to £3.2 billion by the end of the decade.

It believes the main reasons of the reductions are the abolition of Warm Front, the only Treasury-funded energy efficiency programme for households and cuts to the ECO programme.

In response, DECC said: “This government is serious about making vulnerable people’s homes warmer and keeping energy bills low. That is why we are increasing support for those who need it most – the fuel poor and vulnerable – whilst reducing the impact on people’s energy bills by cutting support for those able to pay.”

A survey revealed more than half of businesses would like the government to offer more financial aid and tax breaks for energy efficiency projects.