The network testing experts at Ookla have published an analysis of European mobile roaming speeds over a year defined by the COVID-19 pandemic.

Existing vaccines are, fortunately, effective against the ‘Delta’ variant which is spreading rapidly in countries like the UK. However, the reduced efficacy – especially after just one dose – has already set back the country’s lifting of remaining restrictions by four weeks.

A more virulent, deadly, and vaccine-dodging...