There’s lots of this kind of thing occurring in our front garden! Dozens of these with their ‘takeaways’… These are female Mellinus arvensis - Field Digger Wasps or Fly Wolves, one of the 9,000+ species of wasps found in the UK!
Here’s a bit more info from BWARS:
One of the commonest and most widespread solitary wasp species in Britain and Ireland. The wasp flies late in the year, and is active from late July to October in sandy places (such as heaths, dunes, waste places and even gardens). The wasp hunts for a range of large flies for stocking the larval brood cells.
** Long and thin species, boldly marked with black and yellow*
** Thorax with yellow strip across front and a yellow spot at the rear*
** Two bold yellow bars across middle of abdomen*
** Flies in late summer and early autumn.*
** Nests in sandy soil, often in aggregations*
** Males much smaller and often feed on honeydew on leaves*
** Catches a wide range of flies as prey for its larvae*