This appears to be a UK based site so why on earth are the distance units in Kilometres?
What's more odd is distances from London for things in London. Presumably from some bogus centre.
I tend to use both miles and KM. Miles in the car, KM on the bicycle.
I understand and can visualise what a KM is better than what a mile is though.
I wish we did use Km - I just spent a couple of months riding my motorcycle around Europe, and metric everything just felt so much more intuitive.
Essentially, it's on the TODO list to be updated.