Growing on a wall in my garden.
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From leaf shape it might be this. was it affected by sudden frost?
Yes, it was. It's in a well sheltered place, so until a few days ago was happily growing. We had a very hard frost which lasted a couple of days, and then everything got snowed on! I should have done this photo while the weather was better, really.
Lat/Lng: 52.0, -1.5
OS grid ref: SP3937