I've been puzzling over this bird for a few days now and Grahame and I discussed it privately yesterday. My initial impression was that it was a Pied, especially in the first image - it's over-exposed but the underparts are fairly dusky, the orange rump contrasts with the darkish upper tail and the supercilium, although quite bold, doesn't look as long or as white as on Grey. However, the tail looks a tad long even in the first image, and as Grahame has pointed out, the orange rump extends to the sides of the base of the tail, which is apparently not typical. In the second image, the tail looks really long, although this impression may be exaggerated by the angle it's being held at, the supercilia look bold and contrasting and the throat looks rather white. In addition, the outer tail feathers look rather rufous. This all gives a Grey-like feel.
I then remembered a bird which wintered in Abu Dhabi a few years back, which I recalled showed quite a strong supercilium in certain light conditions. You can see some images here - nos. 5-16:
Pied Bush Chat. Note how much the appearance of the bird varies from image to image. In particular, in image no.8 taken by Oscar Campbell, the supercilia look bold and meet at the base of the bill, just as they do in the OP bird, the whitish throat looks quite contrasting and the outer tail feathers look quite reddish. All rather different to the following three images taken by Mark Smiles. It's also worth noting how much shorter the tail looks than that of the OP bird in all the images.
The bird photographed in Mirfa in images 17 & 18 looks even more anomalous - it even has quite rich brown ear-coverts which contrast with the nape, a feature that John stated is more typical of Grey, and a clearly demarcated white throat.
Grahame's suggestion of mixed origin may be valid as the tail does look a bit too long for Pied, but I wonder how much we can rely on these images, which may give an anomalous impression.