It seems that Google does not want to update satellite imagery all at once, they are rather updating parts of the map on Google Earth Pro at certain points.
I don't really want to bother with screenshotting and noticing differences. I am sadly not an expert with Google Earth Pro(more of a Google Maps person, however, google refuses to update maps.google.com satellite imagery for a long time. So it's better to see newer images on Earth Pro). I will try and find a replacement or even draw out a line that you can download and insert into google earth pro.
For now though,
Image 1 & 2: the newest imagery along the route shows a lot of major works around Ufton woods(Especially the now gone road just outside of 'codemasters'/Dallas Burston Polo Club) with the TBMs seen at the north end of the tunnel.
Image 3: The Chiltern Tunnels North Portal site is starting to look like it's getting ready. Just looks now that they are/were waiting for some pylons to be diverted and removed.
Image 4: The Chiltern Tunnel Vent Shafts are in full swing. South Portal Image still is the same as what it looked like in March last year.
Image 5 & 6: North London Northern Tunnel portal site seems to start taking shape. Old Oak Common images are of March this year but not much since the last image. All the London Tunnels Vent Shaft sites are in full swing.
Image 7: Can't really describe Euston at the moment. But it looks to be a working full swing site.
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