niamh geaney , 26 , and karen branigan , are n't the only pair to have found their real-life doppelgängers , either by mistake or after a social media hunt .
now three similar british cases have been revealed ; a london-based journalist who found hers in birmingham , two male university students , also in london , and two retired men in essex .
the pair , who are both grandfathers-of-four now living just 150 yards apart , also realised that as well as being doppelgängers , they had an awful lot in common .