Hi your courgette looks rather like mine
I thought it might have been the effect of that very wet cold spell we had in July so didn't worry too much. Since then I've developed a rot at the growing point I've picked out. Some flowers have been afected with the centre being horrid.
Mine are in a sheltered spot so not wind that's done it.
I'm trying to find out what it it. Will post as and when come up with anything.
M
Where abouts in Yorkshire?