Can we just agree to a phase down of that coal generator instead?
The fuel (coal) left onsite is also an environmental liability and really needs to be gotten rid of by burning it, necessitating a carefully planned shutdown schedule.
Realistically, there is no going back: once the last coal-fired plant is closed (in September 2024), it will be gone for good.
We probably want to be sure if gas imports are heavily hit again or a major interconnector goes down we'll be fine before entirely demolishing it.
Gas is now more of a year-round flexible baseload, taking up the slack whenever demand is high and/or renewables production is low.
Nuclear is now the only true baseload in the UK - always generating more-or-less the same output except when they have to be shut down for maintenance, refuelling, or decommissioning!