Who is it ? No. 1

Courtesy RHA
Click on any image for a larger version

I have been running a "Where is it?" series on this blog for some time now and the other day I had a thought to complement it with a "Who is it?" series, of which this is the first. Answers in a comment to this post please.

You can see the full "where" series by clicking on the "Where?" tag at the bottom of this post, and the remaining unsolved ones by clicking on the "unsolved" tag in the latest post in the resulting series, if there is one.

For the current "who" series, when it gets into its stride you will be able to see the full series by clicking on the "Who?" tag at the bottom of the post and the remaining unsolved ones by clicking on the "WhoUnknown" tag.

Good luck.

Update 24/7/2016
I can see I'm going to have to give a clue here.

The piece below is a detail from one of his creations.