Should the UK defend itself against Iranian attacks?

Iran recently fired intermediate-range ballistic missiles at Diego Garcia, a joint UK-US base in the Indian Ocean, demonstrating a reach of around 4,000 km that covers major UK cities. The UK permitted limited US use of its bases for defensive operations following Iran's regional attacks on allies, amid an escalating war involving the US and Israel. This has raised concerns over the UK's limited missile defenses and potential direct threats to British interests.