Stratiomys singularior, the Flecked General, is a Palearcticspecies of Soldier fly
The Flecked General Stratiomys singularior, photographed on Wilden Marsh by Mike Averill. This was thought to be mainly coastal and there will only be a few records for it in Worcestershire.

The Flecked General Stratiomys singularior. (Photo by Mike Averill on Wilden Marsh)
You’re quite the entomologist 🙂 I have to work very hard to ID insects. Here in the US I get help from bugguide.net.
Thanks! I have ID books too. In this case, though, Mike Averill identified the insect. 🙂