Not even slightly garden or park! On a long ramp down into a pedestrian subway.
About six inches high.
No interactions present.
Not sure enough for an id - it looks a little like Garden Chrysanthemum
steve_t - Would Conyza not have narrow leaves? Or be more rosette like when young?
Blog - Loose and Leafy - http://looseandleafy.blogspot.com/
Lat/Lng: 50.7273, -1.8645
OS grid ref: SZ096919