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

SCHEDULE 5ELECTRICITY TO BE STATED IN ROCs

Article 35

Way of generating electricity	Amount of electricity (in megawatt hours) to be stated in a ROC issued in respect of the qualifying proportion of electricity generated using 2015/16 capacity	Amount of electricity (in megawatt hours) to be stated in a ROC issued in respect of the remainder of the electricity generated using 2015/16 capacity
Co-firing of regular bioliquid with CHP	1	2
Dedicated biomass with CHP	$\frac{10}{19}$	$\frac{2}{3}$
High-range co-firing with CHP	$\frac{5}{7}$	$\frac{10}{9}$
Low-range co-firing with CHP	1	2
Mid-range co-firing with CHP	$\frac{10}{11}$	$\frac{5}{3}$
Station conversion with CHP	$\frac{2}{3}$	1
Unit conversion with CHP	$\frac{2}{3}$	1