This is the definition of the Record. A very fast, supple, light tyre. No protection other than the rubber itself. I’ve only used the tubulars, and they are the best feeling tyres I’ve ridden.
Ultimately if you get a puncture in a TT, your race (or hopes of getting a good time) is over, but that’s the trade-off. IME, TTs in the UK are held on clean B roads, but you’ll need to judge whether these are appropriate for the courses you’ll ride.