ID confirmed By BWARS
One of many similar black and yellow striped wasps. Great care is needed with identification and expert help should be sought.
Habitat
Found in a wide variety of open habitats, associated with its nesting and feeding sites and prey habitats.
When to see it
Recorded from May until September, with males mostly found from late May and June, and females during June and July.
Life History
Preys on weevil larvae of the genera Hypera (Curculionidae). A tube-dweller forming a series of 4 to 12 linearly arranged cells separated by clay partitions in hollow plant stems, e.g. bramble, burdock, elder and thistles. An egg is laid in the cell before about 20 weevil larvae are added.
UK Status
Distributed from Cornwall to Kent and north to Nottinghamshire and East Norfolk, with an isolated record from Westmorland. Lack of records since 1970 indicates that this species has recently undergone a significant decline, especially in the northern part of its range… Naturespot
Cambridgeshire Bees,Wasps and Ants 
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