So many questions, even more answers, probably!
why my runner beans have produced lots of flowers but no beans? (they have been flowering a long time but the flowers just dropping off, lots of insects around here)
Always happens with the first ones. Patience usually cures it!
when do autumn raspberries flower?
Mine, (Autumn Bliss) are in bud now.
When should broccolli and cabbage be harvested roughly? (i was given lots but type not known)
Can't say without knowing the variety. There is early and late broccoli and with careful planning you an have cabbage of different varieties all year round.
And...............
The answer to Life, Universe and Everything is, of course, 42.