Marsden: Yeah, I would have real regret if I didn’t and it negatively affected the people I care about.

Ms Watson said the power outage was a "novelty" at the beginning, but that she is concerned the cold temperature will negatively impact her son's health.

"On the other hand, if the uncertainty surrounding the signals from Trump drag on for a longer period, there is a risk that this might impact the investment environment negatively."

He runs ten-week courses at Bristol on the science of happiness and talks about the need to find balance because, as he puts it, "our minds are biased to interpret things very negatively".

It didn't surprise me that some Germans had responded negatively to Cornelia's research.