The holiday dates would need to be defined in the order with exact dates and times for holidays starting an ending. So she has to follow that - if she doesn't it's a breach. So it would be something like
And half the school holidays as follows:
Half terms:
Half of each half term with each parent, commencing from the last day of term, with consecutive days and changeover midday on the Wednesday, keeping to the usual week-end schedule.
Easter and Christmas holidays:
1 week with each parent, commencing with the first Monday after term ends. Weeks to alternate annually. Week 1 with Father and week 2 with Mother in 2025 and odd years.
Summer holidays:
Commencing with the last day of term, if it is a Friday, the holidays to run from school with changeover on Fridays at 5pm. If the last day of term is any other day then the holiday schedule commences on the first Friday after term ends at 5pm, with any days preceding that forming part of the usual term-time schedule: Weeks 1 and 2 with Father, weeks 3 and 4 with Mother, week 5 with Father, week 6 with Mother. Any additional days to be shared between the parties.
Early May Bank Holiday: This will form part of the usual term-time schedule.