Which meringue is safe to eat without baking?
As you're in the UK, they're all safe.  Raw egg is safe according to the NHS

Because of improved food safety controls in recent years, infants, children, pregnant women and elderly people can now safely eat raw or lightly cooked hen eggs, or foods containing them, that are produced under the British Lion Code of Practice (regarding hygiene and especially salmonella).

This doesn't apply to all other countries, but it's worth checking in many EU countries, where dishes containing raw egg are traditional (such as chocolate mousse and tiramisu).  I've failed to find a single reliable source covering many countries, but Finland, Sweden, Denmark and Norway are essentially salmonella-free.   I read enough French to make sense of some sources, but can't find anything definitive more recent than 2013 in which products made from raw egg are advised against for high-risk groups, but generally acceptable; in particular recipes assume that pregnant women will be avoiding raw egg.