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BTW, The Grown Man Shave are having clearance sale with a lot of DRH stuff right now.

This is how DRH main shop looks from the inside (they have another branch some 200m further North):312807
As to T&H, you should definitely visit them, because they not only "cut hair", but also have...

May be you are right that "they went off the radar", but I don't think it was because "hardly anyone had stayed with them" - it just that it's impossible to maintain a hype about 200-years-old...