Nottingham City Transport (NCT) is the major bus operator of the city of Nottingham, England. NCT operates extensively within Nottingham as well beyond the city boundaries into Nottinghamshire county. Publicly-owned, it is today the second largest municipal bus company in the United Kingdom after Lothian Buses in Edinburgh, Scotland.

In 2007, Nottingham City Transport became the first company in the UK to introduce Ethanol powered “Eco” buses. Named “Ecolink 30”, the service used a combination of standard diesel-powered Scania OmniCity buses and 3 specially converted ethanol Scania OmniLink buses on its Pink Line 30 route.

As of August 2020, the fleet consisted of 310 buses, including several training buses. NCT already operates the world’s largest fleet of biogas double decks in the world at 120 Enviro400CBG buses.

Biogas is produced naturally through anaerobic digestion, using food waste, farm waste and sewage. The methane emitted from the digestion process is captured, treated and turned into fuel and the use of biogas has enabled NCT to halve its diesel consumption from 8 million litres to 4 million litres per year.

In addition to their smart, stylish design and comfortable ride, the biogas fleet has contributed to improving Nottingham’s air quality. The existing buses have prevented over 26,000 tonnes of CO2 being emitted, as well as reducing NOx emissions by 180,000kgs.

The newest bio-gas double deck buses will operate on Brown 15, 16, 17; Orange 35, 36 and Lime 56, 57, 58, 59 and all 23 are expected to be in service by the end of August.

According to Wikipedia; westbridgfordwire