Can he insist on holiday dates?

[hotdiggitydawg]

We have a court order saying term time pattern continues throughout holidays, (Me having DS Wed and Thurs, ex DH having him Mon and Tue and us alternating weekends.) with an additional one week for each parent (7 nights) at Easter, an additional week each at Xmas and two separate additional weeks each during the summer.
Court only finished in Oct last year, so so far we've only dealt with the Xmas hols (ExDH decided he wouldn't take up the 7 day hol option) and the Easter hols (ExDH took up the 7 day hol option, but stayed in his flat for five days then took him camping 2 nights).
Now we are approaching summer. Do the dates have to be agreed between us or is it ok for him to dictate his dates, giving me no choice? He has emailed to say he is taking DS away July 23rd for 7 days. My son's oldest friend's parents are getting married July 25th and it is a three day wedding weekend, events on the Fri nite, Sat and Sun. We have all been super excited about it and looking forward to it for a year or more. I checked the calander and that weekend was one which I would have care of DS, so in April this year I rsvp'd to say yes and booked accommodation and they have ordered special meals for my son even who has allergies. DS knows about it. Ex DH didn't know about it as he never talks to me except to threaten me. I did not think I would need to inform him as it was a weekend DS was timetabled to be with me. BUt horror of horrors, he's now emailed to say he's taking him away that week!
I said I'm so sorry we already have long standing plans for that weekend and explained the wedding, rsvp, DS's oldest friend, etc. Even outlined the list of fun events they are putting on for the kids all weekend which DS knows about.
Ex DH is saying tough; the entire holiday period is up for grabs and first to communicate their dates, gets them.
I haven't specifically asked the lawyer about this as it's Saturday and I've run out of money to keep asking lawyers stuff, but they did say in response to a previous, query of mine that I can tell him "Sorry those dates are not convenient" when arranging our period of 7 days over the hols.
I've explained that we need to check with the other parent when arranging our 7 day hol period to ensure there are not clashes and agree dates. But he says the court order means all dates are up for grabs and first come first served, so he's taking him. Is this true?
My ds will be devastated to miss the wedding weekend. He also finds it very hard spending prolonged periods with his father (Dad with nasty temper, etc.) , but that's another story.
Can anyone advise?
My instinct is to just reply again saying
"we need to consult with the other parents to arrange dates for our 7 day hols, and unfortunately that weekend is not available as we are at a wedding." BUt he is saying I am going against the court order.
The court order just says "Two seperate additional weeks with each parent during the summer hols, following which the term time pattern recommences." It says nothing abbot how those 7 day periods are agreed.

[undoubtedly]

but is he planning to take him abroad?

[hotdiggitydawg]

He hasn't mentioned going abroad or mentioned ds' passport (i think the mad passport hunt was when his solicitor needed him to provide it as i.d.)

That will be a hurdle to cross another time I expect.

[undoubtedly]

Oh sorry I presumed he meant taking DS abroad.

Can you go and pick DS up on the 22nd?

[HeadDoctor]

No he cannot. The rule is 28 days and only if you have either consent from everyone with Parental Responsibility, a Child Arrangements Order stating that the child lives with you or a Specific Issue Order.

[HeadDoctor]

I assume he could have applied for a passport without your knowledge?

[hotdiggitydawg]

When he doesn't even fork out to buy him a toothbrush or pyjamas or a pillow case, I doubt he's going to fork out for a flight. I imagine it's a camping trip in UK.
Anyway, where he wants to take him isn't such an issue, it's an issue that he is insisting he take him for this particular week when smack bang in the middle of his proposed 7 days is our 3 day wedding weekend.

[undoubtedly]

So I would offer to pick DS up yourself, so you know he's going to come back.

Possibly giving your ex very little notice, so he can't change his plans and fo earlier