Not a great photo, but clusters of white eggs on the leaves of Marsh Cinquefoil
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If you look at the leaves you will see they differ from Water Avens. This is Marsh Cinquefoil - Comarum (Potentilla) palustris.
Oops! Thanks :)
Lat/Lng: 51.125, -0.89383333333333
OS grid ref: SU775367