looked similar to black nightshade as a small plant but dissimilar when it got bigger!
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Looks like a Solanum to me, flowers are wrong for Circaea lutetiana.
I think it is similar to Solanum ptychanthum, but we need to see the fruits, flowers, underside of leaves and stem.
The observation is from 2010.
Lat/Lng: 52.8222, -1.8939
OS grid ref: SK072249