Flowerheads emerging above heart-shaped leaves which will become up to 60cm across in summer. Said to have been used to wrap butter.
No interactions present.
Don't intorduce it to any tidy garden - it is exteremely invasive. At least some species (eg P. paradoxus) have wonderfully scented flowers, early in spring, before the leaves.
Looks more like Giant Butterbur (Petasites japonicus) to me
Lat/Lng: 52.6, 1.4
OS grid ref: TG3613