Unkown beetle

Unkown beetle

Observation - Unkown beetle - UK and Ireland. Description: Can anyone help me identify this beetle? It was found in my garden. Also, there are hundreds of mites attached to it, writhing around (see second photo). Does anyone know what species of mite they are, and what they are doing on the beetle (will they eat

Can anyone help me identify this beetle? It was found in my garden. Also, there are hundreds of mites attached to it, writhing around (see second photo). Does anyone know what species of mite they are, and what they are doing on the beetle (will they eat it alive?).