Well, I just had to share this with you because it was so unusual.
Switched on light, one of the 3 candle bulbs in the fitting blows. Was
able to physically see the filament has broken and is dangling.
Gave the fitting a shake, the dangling bit of filament swung back and
makes contact with the live conductor and with a bright flash it seemed
to "spot weld" itself back into place.
The bulb lasted another 3 months of normal use before blowing again
beyond "repair" :)