The .tcx is attached.
I noticed it the first time the Spoken Information was announced and it said I had something like 24 miles to go. Well the route is only 16 miles.
When it quoted the Distance, Distance Remaining and Maximum Speed,
it told me "miles" or "miles per hour" but the numbers were about
50% too high so probably metric.
At about 6 miles out, I'm fairly sure it switched to imperial
numbers, but after that wasn't consistent.
Also, I'm pretty sure that the distance to the next turn which was
supposed to be in miles eg ".9 miles" was actually only .6 miles,
so that too was a metric number.