The UK has fitted its first Mk 45 Mod 4A weapon system onto the first-in-class Type 26 anti-submarine warfare (ASW) frigate HMS Glasgow, ending a 45-year-long wait to return to the naval big gun scene after the retirement of the Tiger-class cruisers in the late 1970s.

https://www.royalnavy.mod.uk/news/2024/september/06/20230906-gunning-for-glasgow-as-navys-first-5in-gun-is-installed-on-new-frigate