I am sure I know the answer to this from a common sense point of view but legally what is the position please?

[11Plustrauma]

Ex has stated that if I go in and speak to the school about the children (as in, pop my head round the door at home time and say "mrs x how is DD doing what areas need worked on") then legally he has a right to be informed of that conversation.

Does he?

(I have a thread in AIBU. He didn't even go to her parents meeting and the school have an open door policy and no one has stopped him going in by himself to ask anything he liked)

Nope. Assuming that he has parental responsibility, he has the right to be consulted about which school she goes to, and to be kept informed by the school with reports, invitations to parents evenings etc.

Thank you - I did think it was ridiculous that I would have to tell him every time I talked to the teacher!

He's a divvy. That's a technical legal term btw

'divvy' mumblechum is being polite. I'd say he is a twunt.

I'm a teacher and have had parents kicking off about this sort of thing before. Teachers and parents are free to chat generally about children on an ongoing basis. Both parents are welcome to come to parents evenings, information will be shared with both parents ( I have done parents evening jointly and separately) if one parent doesn't turn up we have no obligation to make sure they know what had been said. If we arrange a meeting because of concerns we inform both parents about it. We make sure both parents receive copies of reports and
dates of parents evenings and trips.
I generally find that when a parent huffs and puffs about this sort of thing, they cause a big fuss for a couple of weeks then you don't see them for months!

and I'm sure if the OP 'fed back' every little tiny conversation about the DC he'd soon get bored!

He does pick up and drop off one day a week and every other Friday. He has tons of opportunity to call in and see the teacher. He didn't go to parents meeting this year or last.

I haven't stopped him finding out. I just haven't told him every single time I've spoken to the teacher. Which he feels is illegal.