It was indeed several Shining Crane's-bill (Geranium lucidum), up against the bottom of the gabions, at the foot of the Northern Line embankment just before it crosses the Great North Rd. and runs into East Finchley station. There is also Geranium pyrenaicum here. There were two Teasel flower stems, a Broom and some Holly.
On the north east side of the line is the small Cherry Tree Wood, which I'd not visited before. Like the woods down in Highgate, it's Oak and Hornbeam.
Nothing out of the ordinary, but 2 Redwing and a Great Spotted Woodpecker were seen, along with a Brown Rat and 1 Stinking Iris (a native plant, though this was very close to gardens, from which the seed may have come).
Self Heal was in the grass by High Rd flats opposite Bedford Rd, and at Stokes Court, Diploma Avenue. 16 Ring-necked Parakeets flew across the High Rd towards East Finchley station.