Another alternative, could it be Trifolium Incarnatum, Crimson Clover?
Often grown as a green manure, so it may have been sown to provide groundcover during the lockdown, rather than leave the soil bare to provide a home for weedlings.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
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Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.