The pics off the web, looking up close in the cropped version I guess it could be silver fern, and as wild edges says the blue has been turned up so a blue grass would look even more blue than it does here. Also the list of plants on their site I don’t think are in any particular order. I guess asking them can’t hurt!
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Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Watch out as its a type of bramble and spreads by layering itself everywhere one of its arching stems touched the ground.
A beautiful plant but you have to ‘manage it firmly’ or it can be very invasive.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.