Nice photos as always! I think it's Platydracus stercorarius - one of the Rove beetles (and related to Devil's Coach Horse). Some more details here https://species.nbnatlas.org/species/NBNSYS0000023513 and here https://www.naturespot.org.uk/species/platydracus-stercorarius
Thanks for correcting me. I could see from the red elytra is was something I had not seen before. Glad I was at least close-ish.
@mespilus started
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Nice photos as always! I think it's Platydracus stercorarius - one of the Rove beetles (and related to Devil's Coach Horse). Some more details here https://species.nbnatlas.org/species/NBNSYS0000023513 and here https://www.naturespot.org.uk/species/platydracus-stercorarius