This route was bolted by person(s) unknown some five years ago. It was a non-controversial retro-bolt. The only issue at the time was that the anchors were fitted to a large, insecure block, and were removed for safety reasons. At the time the other bolts were assessed as being ok. You can read about it here ...
Mark Gamble and myself were struck by the similarity of the bolting on Breakfast At Tiffanys, also the action of a phantom bolter, and given what we found at the latter route, thought it would be worth a closer look at Mank Mistress.
Unfortunately we found identical sub-standard installation practice on this route. Luckily for the climbing community at large, this has not proved to be a popular route, and the bolts have never been subjected to substantial loading. Mark has posted some photos here ...
Removed by: D Reeve and M Gamble
removed as unsafe five years ago and never re-instated.
type: 3/8" x 2.5" (THE S30400) machine bolts... SS, probably 304
fixed hanger: Adrenalin SS marked 30kN
surface preparation: none
glue: unknown - grey soft material, definitely not epoxy, and too soft to be any of the standard chemical bonding adhesives
placements: over half the bolts were placed in substandard, poorly attached blocks. Given adequate quality rock was readily available adjacent to the placements is can be assumed that no attempt was made to evaluate rock quality by 'tapping it out'. The second top bolt was in such poor crumbly rock that it could be exposed for much of its depth by picking away pieces with light hammer blows.
Given this retro has been non-controversial, the intention is to rebolt with glue-in rings when time permits. The anchor will need to be short of the top given rock structure at that point.