I do rate the London Fields Lido, pool heated to 25C, you could probably swim there today (although I haven't checked, no idea if the concourse around the pool has been cleared or whether there's some other H&S hazard that militates against it). It is a fairly basic facility without most of the astonishing comforts of your Scottish baths, but if all you're after is a swim, it does the job.
I do rate the London Fields Lido, pool heated to 25C, you could probably swim there today (although I haven't checked, no idea if the concourse around the pool has been cleared or whether there's some other H&S hazard that militates against it). It is a fairly basic facility without most of the astonishing comforts of your Scottish baths, but if all you're after is a swim, it does the job.