The message
from "Griff" contains these words:

Hi,

This year the first 2 - 3ft of flowers on my runner beans have dropped off
without any beans having formed?

possibly either to cold or too hot/dry for their liking

Anyone have any suggestions as how to prevent this happening.

If it's been very hot/dry lately in your neck of the woods, soak the
soil really well preferably in the evening, and while you're at it
lightly spray the flowers with a fine mist of water.

Hopefully the rest might set?

Should do. They can flower and fruit until frost comes. Mine are very
late even starting to flower this year ,after a cold spring when they
did nothing for weeks.

Janet.