By Joseph Connolly & Joe Smith A bouncer who returned from a late shift and died in his sleep went undiscovered until his boss at the security firm came to see why he wasn’t answering his phone. Cairan Gemmell, who lived in West Bridgford near Nottingham, died on Saturday, March 23, was described as a “lovely” man with “a good heart” in tributes by shocked friends and family. Cairan had returned home from the city where he’d worked one of his standard night shifts as a doorman and was thought to have fallen asleep after returning home late when he died unexpectedly the next afternoon, Nottingh…