Appreciate your post. We both did intend on purely capturing portraits in which we asked people for their shots. But these were very unsuccessful that day, we were getting a no from generally everyone we asked. Which is why i went for some candid photography instead.
We didn't take it 'in turns' to ask, it was just whenever we genuinely saw someone interesting, and actually got a yes from them.
I agree that none of mine are in fact street portraits, apart from one - but that was down to being unsuccessful in actually getting people to agree with having their shot taken. Hopefully next time this will change. At least I got some street candids from the day, though..