What is this wasp type thing?

[gretsch-drummer]

Spotted this creature on the driveway today, never seen anything like it before:

2017-07-23_05-17-18 by Andy Wilcock, on Flickr

[gretsch-drummer]

A pigeon was eyeing it up for lunch but had 2nd thoughts when it realised it was BLOODY MASSIVE!!!

A stunningly bright bugger though.