3i Infrastructure has announced plans to invest an further £125 million in Infinis so it can acquire Alkane Energy.

Infinis is the largest generator of electricity from landfill gas in the UK, in which 3i Infrastructure invested in December 2016. Alkane operates the largest portfolio of coal mine methane sites in the UK, capturing methane from mothballed and closed coal mines and converting it into electricity. As of December 2017, Alkane had 160MW of installed generating capacity at 32 sites across the UK.