Adjustment screw stuck in dropout

[Ed no-more-lemons]

While it might be nice to retain adjusters as an original feature of a cherished frame, whenever I've had this problem (1<n<7) I've ended up calling it quits, sawing/snapping/snipping the adjuster as close to the dropout as possible and filing it flush. It must take me, ooh, 4 seconds longer to centre the wheel, compared with possibly many hours trying to extract a broken one. I can live with that!

Is anything but a cherished frame as has two small dings to the downtube and the front cable guide for the back brake cable is missing.
On the plus side the paintwork is good and this full 531c Dalesman should provide the basis for a quality ride broken screw or not, only another thing to get all OCD about!