By Branwen Jones Hundreds of people have been left stranded in -7C temperatures in Bulgaria after their Jet2 flight was diverted and cancelled. A Welsh family who had been enjoying a break in Turkey said their holiday ended in a nightmare on Friday evening as they were expecting to fly back to Bristol but instead found themselves stuck in sub-zero temperatures in Sofia. A passenger described the ordeal as an “absolute shambles” – and Jet2 has since apologised to “all affected customers”. The flight was diverted due to a person needing medical attention. The rest of the passengers said they wer…