A fly of 2 halves!

A fly of 2 halves!

Observation - A fly of 2 halves!. Description: Can this striking fly with its black thorax and golden abdomen be identified from these photos? It was seen in a damp woodland valley - I think it's on nettle leaves. Thanks

Can this striking fly with its black thorax and golden abdomen be identified from these photos? It was seen in a damp woodland valley - I think it's on nettle leaves. Thanks