Update on a small population - today I counted maybe a dozen individual plants? - that persists in an area of 'lawn' that is continually mowed back to ground level.
Forb 30cm high. Naturalised.
Forb 30cm high with milky sap. On roadside.
Spindly shrub 60cm high
Shrub 2m high
Shrub 50cm high
Shrub 1.5m high
Shrub 2m high