Genuinely curious about where you read that the UK has no energy security? It's not something I've read about before, but is something I'm pretty invested in as a UK citizen.
No it isn't. Vaccines create immunity, that's the point. Also, what diseases that don't kill you also don't result in immunity? "There's no evidence of immunity" seems an absurd statement, we can literally see the antibodies people create in response to the infection. That seems like just looking for an excuse to attack the UK.
The time for creating choice on the cornonavirus response was during the last 20 years. They chose rampant financialisation, leveraging future income.
The UK has no energy security. No food security. I feel the corner we have painted ourselves into makes a prolonged shutdown far, far harder.