Slender colourful beetle
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It certainly looks like Spanish Fly, which I believe is a rare immigrant to the UK, so an exceptional sighting.
The history of the use of this insect for all sorts of 'medical' and other purposes is intriguing (including a role in "the world's first recorded stink bomb"):
Entomologist and biological recorder
A very enviable sighting. I think Spanish Fly has become established on the Isle of Wight in recent years, or has at least been seen there quite regularly. Not sure where I've heard this; there's no mention of it in The Coleopterist journal.
Thank you for your info.I will pass this on to our IWNHAS .This is our regular walk but usually in eves.Now we know what this is Dave tells me of a iwnhas member who looks there for it.
Lat/Lng: 50.5861, -1.2365
OS grid ref: SZ541765
On path with grassland nearby