...the wing bars don't look white enough, especially towards the edge of the wing where they are quite brown...
Now I know why I get so confused. Sorry I don't have any more photos from the same day but I have posted 2 from today at the same place. I presume they are the same as there appears to be a large flock staying in the area. Thanks for looking.
Some are old buff-tipped coverts and some are fresh white-tipped ones.