How long does nuclear refuelling take?

https://www.edfenergy.com/energy/power-station/daily-statuses

Heysham 2 has been offline for a long, long time now, and still says that it won't be back online until April.
Surely it doesn't take 3 months to refuel a nuclear reactor?
Anyone with more knowledge than me, feel free to correct me.

Will additional nuclear have a place in future energy supplies? And if so, I assume we will see similar huge offline times for reactors and the associated spike in prices passed along to the consumers?