Butterfly Larvae Food Plants:

Common Blue = Birdsfoot Trefoil

Common Blue Female on Birdsfoot Trefoil plant

Comma = Common or Small nettle

Clouded Yellow = Clovers,  Birdsfoot Trefoil

Common Blue =
Birdsfoot Trefoil

Common Blue Male on white clover

Dark Green Fritillary = Common Dog Violet

Grayling = Marram Beach Grass

Green-veined White = Garlic Mustard

Holly Blue = Snowberry bush Bramble

Orange-tip = Garlic Mustard; Lady Smock (aka Cuckooflower)

Painted Lady = Thistles

Peacock = Common or Small nettle hops

Red Admiral = Common or Small nettle

Ringlet = Cocks foot grass,  false brome

Silver washed Fritillary = Common Dog Violet

Six-spot Burnet =  Birdsfoot Trefoil

Small Copper = Sorrel, Sheep Sorrel, Docks

Small Heath = Fescue grass

Small Tortiseshell = Common or Small nettle

Speckled Wood = cocks foot grass,  false brome

White Large = Nasturshums. cabbages

White Small = Nasturshums, cabbages 
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Those above in italics and underlined are species that I have never seen. I include them here anyway for the benifit of those lucky enough to have done so.