All 20 of the British nuclear plants are operating with insufficient insurance. After Chernobyl they each required insurance of 40 billion.100 after Fukishima.
No insurance is available commercially above 1 billion. So as Tony Blair privatised them, each plant became illegal.
19 of the 20 plants are operating outside of planning – planning extensions are only possible after a new Royal Commission, and independent plant inspection: thanks to price Charles here.