Child access

[Kimberleysmith]

My ex and I separated last year, and we have a now 15 month old.

We went to mediation and the end result was my ex would have our child two nights and three days, every week. He works shifts, and so has four days off and then he's back to work for four days. I work
a 9-5 job part time.

My ex has now said that our current arrangement isn't working for him, and he wants our child for three nights, four days, but only when he finishes early on his first rest day, so it would be every 2/3 weeks this would happen. I've spoken to a solicitor about this, as my
concern is our child needs a good routine at such a young age and the solicitor agreed with me. My ex has now threatened to start court proceedings, of which I anticipated.

Whose being unreasonable here?

2 nights at 15 months is quite a lot, anyway, unless he was incredibly involved in their care before this point?

Given that, it would appear unreasonable to be adding in an additional night and reducing the frequency, as this could be like your child having to become reacquainted every 3 weeks if I'm understanding this correctly.

Courts wise.... Courts tend to expect flexibility with contact from the primary caregiver parent with the contact, so they'd likely say working around this isn't unreasonable. But, I don't think at 15 months, they'll say go to 3 nights. So I'd be batting back, 3 overnights and 4 days at such long frequencies is not in your child's best interests to be away from their pcg for such long periods. But you'd maintain the number of overnights at that interval if that's his choice.
Say this in an email. Make sure it is documented. Keep his response. If necessary I'd add that you believe that if he doesn't agree, going to the family courts would be in the best interests of the child. So he knows you're not scared so he can't throw this threat around nilly willy.