People who are single or living alone are more than twice as likely as the population generally to say they could not cope with an unexpected bill of £850, an insurer’s research indicates. More than half (58%) of adults surveyed who are single or live alone would not be able to cope with a surprise bill of this size, compared with 23% of people generally, according to the survey commissioned by Aviva . People who live alone are typically spending more than £1,200 a month on fixed costs alone, before they can consider any discretionary or “fun” spending. Savings are also squeezed, with more than a third (37%) of adults who live alone saying they do not save anything on a regular basis. Among those who live alone and do save, four-fifths (42%) contribute to a cash Isa , the survey found. According to the research, people who live alone spend just over £630 (£633.95) a month in total, typically on essentials such as food bills, utilities, council tax and transport.…