There is no sign of Nils van der Poel, Sweden’s double Olympic speed-skating champion in Beijing, but that does not stop over 500 competitors from gliding elegantly around a vast frozen lake just outside Stockholm. It is a thrilling sight as they hurtle around the 50-kilometre course at speeds of 30 kilometres per hour (20 miles per hour) and it is a welcome one as the “Sigtunarannet” returned on Sunday after three years out of bounds. This is, in fact, only the second time Sigtunarannet has been held since van der Poel won the inaugural race in 2018. This year the 25-year-old had bigger fish …