Got to Coombe Bottom quarry just after nine and bumped into a striped leaf warbler at 9.20, at the back of what was the Terminus. This bird was very washed out, with white wing bars and super and frosty shoulders and back. Had it calling several times again during the day and am sure this one's a Hume's. But Iain Outlaw managed to photograph an obvious yellow-browed, which was also heard to call several times during the day. So, we have a confirmed yellow-browed and possibly a second bird, to my ears and eyes a Hume's. We'll see if anything comes of it.