The Department has published projections of electricity generation by source for the UK; regarding renewables1 the following projections have been made (TWh = terawatt-hours).
The Department does not break down these figures into regions.
The figures are based on central estimates of economic growth and fossil fuel prices and contains all agreed policies where decisions on policy design are sufficiently advanced to allow robust estimates of impact (i.e. including "planned" policies). The detailed description of the methodology used to calculate the electricity projections can be found at https://www.gov.uk/government/publications/updated-energy-and-emissions-projections-2016
1 Includes a small amount of generation from non-renewable wastes.