I can only assume thatbecause of the atrocious weather earlier in the year there were not enough insects around to pollinate the blooms - this is very sad as birds rely so much on pyracantha berries for winter food - the other year neighbouring pyracantha hedges were host for a week or so to a flock of visiting waxwings from the continent - a wonderful sight.
I hope that people realise how much blackbirds and thrushes rely on the berries from our garden shrubs and put out plenty of fruit-based feed for them this winter - scattering raisins and currants on the ground will keep many of them alive this year.