This bird was photographed by a member of the UAE Bird Photographers' Facebook page. I put it on the UAE forum on his behalf but got no response.
It's seriously puzzling me as I've never seen anything like it before. The pale collar and rather streaked/scaled upperparts recall some form of Stonechat, but the proportions are wrong, bill and primary projection are too long and the tail pattern (inverted T) is that of a Wheatear. But I've never seen a Wheatear looking like this.
Any thoughts would be welcome.