UK-based investing - to ISA or not to ISA for target date index fund

In the PFC course, chapter 5 looked incredibly useful for US taxes but I’m based in the UK so feel there’s a piece missing for how to maximise my investment/limit taxes on earnings.

Should I be looking at a Vanguard Stocks and Shares ISA for a target date index fund? Or something else? Or a normal Vanguard investment account for the index fund?