sentences:  The power station was refurbished during 2015, and returned to service in November 2015.The station is now configured for flexibly and efficiently generating between 240 MWe and 400 MWe, with a Supplemental Balancing Reserve (SBR) contract for an additional 750 MWe to provide occasional back-up over the winter period.The station has secured contracts up to 2021/22 and is scheduled to produce 1.05GW in 2019/20 and 1.06GW in 2020/21.