I am in Belarus, Eastern Europe. Actually, you are right, miles to km is not that important as the temperature scale. But unfortunately there is no such option neither in the manual, nor on the digital panel. There are people here making conversion by firmware changing. For this purpose they solder out the RAM chip, then reprogram it, then solder again. It seems to be uncivilized method. That is why I am interested to find any other solution. It would be interesting to look at that UK company and what are they offering.