Coal is also able react relatively quickly to flex up/down within a range once running but has relatively high start costs and minimum run time (startup/shutdow

Coal is also able react relatively quickly to flex up/down within a range once running but has relatively high start costs and minimum run time (startup/shutdown takes longer). In the UK, the remaining coal fired plants still regularly participated in the balancing mechanism over the winter, for example (at sometimes eye-watering prices due to those factors along with high emissions costs).