Honey Rose wrote:

This year we are having trouble with loads of sparrows pecking off the
flowers of our beans we have never had this problem before.

Some years the weather decimates the birds natural food source

Any suggestions as to what we can do please we would be so grateful

Easiest/surest method is to lure the birds to feed elsewhere... place
a bird feeder some distance from your beans... add a birdbath too,
sometimes when natural water sources dry up critters will get water by
eating the juiciest most tender parts of vegetation... in early
morning dewy blossoms are a natural water source and legume blossoms
are a favorite. Probably sparrows are not the only birds eating your
bean blossoms.