There is no point keeping steel making industry in the UK.
The strategic argument is nonsense because Britain has to import iron ore and coke to make the steel in the first place so we will never be self sufficient in steel anyway.
If steel is needed for defence purposes, just buy and keep a reserve of a million tonnes of steel and have the rolling capacity to turn it into different sizes. Steel is both cheap and easy to store especially now so the govt should spend a few hundred million on a strategic steel reserve similar to the one for oil and allow market forces to take over. It would be cheaper than keeping Port Talbot going which is losing a million pounds a day.