Given how many people and reviews all complain about the shipping side of things, and items not arriving anywhere near on time...sometimes several weeks for items shipped via the same 24hr services...it's obvious the issue is with the shop not actually shipping when they say, rather than with Royal Mail not delivering on time.
Indeed, because if the Royal Mail service really is as unreliable as they are letting on, then you'd expect VS to change to an entirely different courier.
Given how many people and reviews all complain about the shipping side of things, and items not arriving anywhere near on time...sometimes several weeks for items shipped via the same 24hr services...it's obvious the issue is with the shop not actually shipping when they say, rather than with Royal Mail not delivering on time.