Hi Dyeingforachange
I'm not sure when you will find out what school your child is going to - but you can already look into whether the schools you've listed when you applied for your DS's primary place have before/ after school clubs. These usually aren't too expensive - especially if you juggle drop off/ collecting a bit between yourself and your DH.
We found we really needed the afterschool club (3:30 to 6 p.m.) - so we took turns between us to drop off at school gate in the a.m.
I'm now in a different job & part-time - but we've worked out that various after school clubs mean the school day is effectively 9 - 4:30 for my DDs 3 days a week - so I can work 10 - 4 those days.
Not sure what your work situation is - but you can suggest flexible working - so coming in late but staying late (so you cover morning drop off) - or coming in early and leaving early.
Holidays are very difficult - but you can look into holiday schemes in your area (our local University offers summer and Easter sports camps) - which run 9 to 3:30, but you can pay a bit extra for child care to 5:30. The schools often send home flyers about holiday clubs as well - so again contact the school or look on their website (or in their prospectus). Many professional football clubs also offer holiday camps - if your DS is football mad this is often a great solution!
Our girls' ballet school also offers summer school camp - (9 - 4 p.m) which also helps out a lot. I've got very girly girls - so they adore this.
Once you know where your DS will be going to school - I suggest you contact them and find out about childcare (if there isn't already something in the school prospectus or on the school website).
Finally - although every situation is different - often many other parents are in a similar boat and if you strike up a conversation about 'How are you managing with work over Christmas holidays?' you may find they are in a similar boat and that you can share child-care between you. So one or two days off looking after someone's kid (and providing entertainment/ food) & they look after your kid for one or two days as well. You do lose some holiday - but not all of it. Usually this with a combination of paid childcare and paid leave helps solve the problem.
Finally - you can request unpaid leave due to childcare responsibilities. Not ideal - but possibly more cost effective than paying for childcare. My solution was to accrue overtime in term and have my employer agree I could use it during school half-terms/ holidays.