http://www.legislation.gov.uk/id/uksi/2015/1947/schedule/5

SCHEDULE 5ELECTRICITY TO BE STATED IN ROCs

Article 33

Way of generating electricity	Amount of electricity (in megawatt hours) to be stated in a ROC issued for electricity generated using pre-2013 capacity
AD	$\frac{1}{2}$
Advanced gasification/pyrolysis	$\frac{1}{2}$
Co-firing of regular bioliquid	2
Dedicated biomass	$\frac{2}{3}$
Dedicated energy crops	$\frac{1}{2}$
Electricity generated from landfill gas	4
Electricity generated from sewage gas	2
Energy from waste with CHP	1
Geopressure	1
Geothermal	$\frac{1}{2}$
High-range co-firing	$\frac{10}{9}$
Hydroelectric	1
Low-range co-firing	2
Mid-range co-firing	$\frac{5}{3}$
Offshore wind	$\frac{1}{2}$
Onshore wind	1
Solar photovoltaic	$\frac{1}{2}$
Standard gasification/pyrolysis	1
Station conversion	1
Tidal impoundment	$\frac{1}{2}$
Tidal stream	$\frac{1}{2}$
Unit conversion	1
Wave	$\frac{1}{2}$