I made a super-late (July) sowing of Mangetout this year and they have really done me proud. Much of the main beds (and my Pea sticks) were taken up with an early sowing of Peas this year, but once they had gone over I sowed some Mangetout.
I have never sown Peas or Mangetout this late before. They just seem like a Spring crop to me (even though I know you can grow them all summer long). But I’ll definitely be trying this again as the size of the pods is great and they’re a welcome crunchy, Spring-like snack at this time of year when everything seems to be mellowing and flopping over.