In reply to xplorer: I finally got out to these boulders yesterday. The shark and tiddler are out of the water with the two side wall problems on the marlin also out. The level at that time on the environment agency site was 11.70m, it's just a guess but I reckon anything below 10.00m and they'll all be out of water.
I don't know if I was lucky but there were no midges at all. They must have had a day off as there was none over near ullswater either.