Very small, just a few mm across.
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It's pictures like yours that make me want to buy a macro lens.
Many thanks for the ID and the kind comments.
and smashing little cricket which I've never seen before.Nature is just amazing in its variety of shapes, colours & patterns!
This one is much more dark marked than those I ever see.
Lat/Lng: 51.4435512, 0.080371
OS grid ref: TQ446736
In a suburban garden.