Not Milton Keynes Long , further south. I'm not anti cycling at all, just anti the competitive, three-a-breast, my mud guards bigger than yours brigade!!
Lilac I've been thinking about your question as to how conflict is avoided. Just for background (apologies for repeating myself) we have very set contact days. Two evenings per week, one is a sleepover. All day one weekend. Having said that they often also sleepover once at the weekend (usually through me offering) and see him at additional times when possible. Again, this is me saying "do you want to have dc on xxx because .........".
Also, he hasn't met anybody else and doesn't have a particularly active social life.
Firstly, I present it as this is what I'm going to do. I don't make unreasonable requests (as I know you don't), and as it always involves the dc I don't feel I have to ask his permission. If I'm suggesting something which clashes with his contact day/night, I always offer an alternative and/or additional time at the outset. So he can't say no just because it's "his" night, as I've always already offered an alternative and usually extra time.
If he has a valid reason for not wanting or being able to swap then I do of course alter my plans if I can.
If he does try to pick a fight about something, I just try and sound like a broken record. I just repeat that something has come up, or has been booked for ages, or the dc are desperate to go, so he'll just have to accept it. This is when I always try and remember that I'm not communicating with a regular person. I would never normally be so high-handed and stubborn, but I have to be.
Also, as I think you or Purple said, never use them as Plan A, or even B. So, I never ask him to babysit. I may offer a sleepover if I know I'm going out, but I don't rely on him.
Ultimately my stance is I'm the resident parent, the dc's lives revolve around where they live, their schools, friends etc, and I'm the link with all that. So if something comes up then he has to accept that time with their dad, just like time with their mum, may be eaten into.
I also say to myself what's he actually going to DO? I know what he may think, say to other people, blah blah. But what can he physically do to change anything. So, if