Banded General, Stratiomys potamida.
Soldier flies get their name from their bold and bright colours and markings. This one looking like a very flat wasp. Often seen feeding on umbellifers and Bramble in wet areas. Larvae are amphibious, feeding in ponds and ditches.
![Banded-General fly Banded general](https://www.parkland-walk.org.uk/wp-content/uploads/2023/08/Banded-General.png)