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Nice pics and description - hope a fishy person comes along to contribute!
Lovely fish! Very nice. The Sussex Inshore Fisheries and Conservation Authority says "....and are easily recognized by their two long chemosensory barbels that protrude from the chin ".
It seems fairly distinctive.
Lat/Lng: 51.7221, -4.6831
OS grid ref: SN147060
Wiseman's Bridge, Saundersfoot, Pembrokeshire.