I noticed that as well and wasn't sure whether to chalk it up to lens distortion or if it really is a straighter track now. Interesting also how many fewer track "spurs" there are now.
Considering it starts and ends in the same place, goes through the same places, and the UK isn't known for tectonic activity, I'm reasonably sure the track hasn't straightened enough that it would be visible at that magnitude.
Which is a long way round of saying "I think it's lens distortion and placement".
