really you're not too late yet for anything.
But if you have to prepare the ground then you'll still be in time the tender crops and then those that have to be sown in July/Aug/Sept including all sorts of endive/chicory, winter radish, spring greens, late carrots, lettuce and many others, so don't panic.
I have been in a similar situation and dug, manured, and then sowed french and runner beans all on the same day. Courgettes aren't fussy. If you think that weeds may be a problem the carrots and parsnips may be tricky. but then there's always next year....
Good luck!!
Sarah.