The study looked at how frequently extreme droughts could happen by 2100. The Met Office climate model was used to run a number of simulations and these were then studied to determine how frequently 1976-style droughts could occur.
There were 11 slightly different versions of the model, producing a range of results. At the lower end, extreme droughts would continue to be as rare as they are today - happening every 50 to 100 years.
In the majority of other outcomes from the model, however, 1976-style droughts were more frequent. At the higher end, extreme droughts could happen once every decade - making them about 10 times more frequent than today.