major plot hole? (spoiler)
if both Ginas turned up for work (her co-worker said he thought he saw her already leave) then surely there would have been a time when they were in the same place at the same time. If there were two of me at work then at some point both would descend at my desk, there being only a certain amount of time me/my doppelganger can spend making cups of tea or going out to lunch
Cambridge man you know. His uncle Bertie and I used to break wind for our college.