Replaced blown bulb with a 40w bulb, Wilkinson's own brand (blown one was also Wilkinson, but had been in for 9 months. However, the new bulb blew only TWO days later!
Normally, when a bulb goes in this 2004-built house, it trips the lighting circuit on the same floor, but this didn't happen this time with either bulb.
Dodgy bulb? Voltage spike? Something wrong with the circuit? NB: Nothing else wrong/no other symptoms as far as I can tell.
MM