If there’s no time for a facial, or you’re stuck on a submarine, a private island, or somewhere similarly awkward, then, as any seasoned seductress will tell you, you must have about your person/evening dress/wetsuit/parachute a vial of Dr Sebagh Serum Repair, the deadly enemy of morning-after skin, and a tube of the ultra-hydrating Oskia Get Up & Glow, which is such a good youth-giving elixir it will fool even those trained to see straight through subterfuge.