Most of the Finnish speeds, and all that are on this list now, are measured by GPS devices, 10hz Racelogic Performance Box or Motec 20hz. There was speed traps in one event last year but no fastest bikes there. Antti Pietilä ran 203mph in Bonneville last year, and i ran 243mph in Elvington, these were using speed traps.
This year there should be more riders going to UK and also better speeds are expected in the Finnish event where speed traps are used.