View from a small park off Shepherd's Hill, Highgate, looking north. Alexandra Palace in the distance on the right.
The park looked like it had had a couple of patches sown with a meadow mix of some sort, as Meadow Cranesbill (Geranium pratense) and other unexpected species were present.
I didn't keep a full set of the day's records myself, instead contributing to the filling in of a pre-prepared tick-box list of species.
Notable was the finding of escaped Impatiens balfourii (a Himalayan annual variously known as Balfour's Touch-me-not, Poor Man's Orchid, and Kashmir Balsam), which Mark said was a new record for Middlesex.
A few of us stayed on in the rain to have a quick look at a coppiced area in Highgate Wood, where Himalayan Honeysuckle (Leycesteria formosana) was a non-native occurrence, and Broad-leaved Helleborine was seen.