Hmmm, that is what I thought.
DMM anchors: I have removed a few, and you can get a 5mm bit (smallest sds I could find) and drill down the sides, taking out the resin, only just clipping the metal. A bar can then be used to twist the anchor, breaking the rest of the resin. Then the bca test puller can pull them out, although it still requires it to be wound up to max (10KN from memory) then it takes minutes for it to be fully extracted.
With the BP anchor, a metal drill could be used, but the worry would be that it would break up, when the puller is used. I have some resin that is a couple of months out of date, maybe I will try it on an anchor.