In November 2013, Pioneer formed Primrose Solar, a platform company to build, own and operate a portfolio of 200-300 MW of solar projects in the UK.

Pioneer formed a partnership with global investment management firm York Capital Management to fund the construction of the first 184MW (Primrose I) and then, in 2015, formed a 50/50 JV with York Capital Management and Blackstone Alternative Asset Management to finance a further 69MW (Primrose II).

Primrose completed its construction programme in June 2016 with the energisation of the 49 MW Eveley Farm project, which brought the portfolio to a total of 253 MW of operational solar farms.

Primrose successfully sold the portfolio in three transactions in 2016: 95 MW to the Bluefield Solar Income Fund in January, 78 MW to Greencoat Solar I LP in November, and the final 80 MW to Equitix in December.