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I'm not certain about this - would like to agree but it doesn't look quite right.
But another thing, if one seeks Recommended when forming the post, the only available Cockle (of four possibilities) is the Lagoon Cockle.
See my recent post http://www.ispotnature.org/node/393114
THREE MARINE PROJECTS
Lat/Lng: 53.3334, -3.4434
OS grid ref: SJ039828