I find the potency thing a little hard not to question. There are so many things that could affect your reaction whereas the likelihood of a big U.K. distributor selling flakey stuff seems low.
I was slightly concerned about discretion some years ago when buying a shitload enormous bag of fancy meds in a Buenos Aires pharmacy (sildenafil in multiple varieties, tadalafil I think, and testosterone gel, the ones I can remember). But they honestly didn’t treat it any differently to selling a box of condoms. Maybe the guy at Lloyds was taking the piss. Maybe he’d found god and midnight mass. Anyway, one does have to get over such things when wearing long trousers, doesn’t one?