You can get a close-up of this area by zooming in on the bit with the tunnelling machines - I'm just South of the end of Ada.
Later: Dohhhhh.... the yellow lines are estimated progress in the next 30 days, not the length of the machines. Ada is shown as just starting to dig and moving a fair distance in that time, which may explain why there is currently a really annoying whistling noise coming from that direction - it's chewing its way in. Hopefully the noise will abate once it's fully underground. Phyllis is just approaching Paddington and will pass it over the next thirty days. After ninety days both will be well past Paddington.