Reduced time with son
I pay child maintenance to my ex wife. Our arrangement was i would have him every 2nd weekend and share holidays.
She keeps reducing the time i have him,, instead of getting him on a fri night to sun evening, now i dont get him until late morning on sat and struggle to get any time on half terms.
Not sure how to approach this as she is very volatile
I take it that the arrangement is between you both and not as a result of a court order? The arrangement seems very reasonable and is probably what a court would order. You can apply on a C100 to have the contact formalised. There's a chance she may stop contact in the meantime if you do this though. The best option is to try mediation, which you have to do before making the C100 application anyway. You can find details of mediators in your area at nfm.org.uk
Is she making it later on Saturday because he has activities? If not, then you do really need to have a conversation and bring up mediation
You could send a polite message to her, lay out some arrangements, like have kids fri-sun every other weekend, half of school holidays. If she is not interested, then you can book a mediation appointment. That would be 1st step if you want to take legal route.
@champagne he has started football every sat morning but she doesn't want me to go, even on my weekends
Its hard as any hostility will affect your son. Could you try the Fegans online separated parenting course? It might give you some ideas to deal with the situation. Be good if she could do it too!