Bright yellow large buttercup like plant, growing in amongst newly opening Snowdrops.
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what temperature was it, i think the flowers only open above a certain temperature and yours look as though they were about to open.
I'm not sure, cold though with a strong wind, i had brain freeze by the time i got back! low single figures i would guess. We've had a few warm spring like days though, seems to have also triggered Snowdrops and Yellow Crocus around the site.
Lat/Lng: 53.404607136274, -2.8779646754265
OS grid ref: SJ417901
Damp clearing in woodland, lots of garden and exotics present