It causes them to start rotting from the blossom end before they've grown much. If yours get big before rotting, then it won't be lack of pollination.

I usually hand pollinate - if there's enough male flowers to go around, I stuff one in each female flower. Otherwise I just transfer pollen with fingertip. means I can't eat the male flowers in salads, though :-(

For me, it's been a really bad year for broad beans - no pollination.
OK for French and Runner, and sugar snap peas.

Brilliant year for strawberries, raspberries and tayberries - taking me a good hour every couple of days to keep up with the picking.

But then I'm in Yorkshi on clay soil, and the garden has been flooded twice in the last two weeks.