Infant and junior, or all through primary

[3strikes]

Just that really. Do you think it is better to stay at one primary from 4-11 or is it ok to do infant4-7 then juniors. Not sure what will be best?

Separate infants and junior have worked well for us, though that was with moving into a larger junior (2 form entry infants, 4 form entry juniors). Not sure I'd have particularly seen the benefits of separate schools if basically all the same DC moved from one to the other!

Having a separate infants meant a much more nurturing environment focussed on the younger children with the Y2 children able to take on responsibilities that they wouldn't have had in a 4-11 school.

Moving to a bigger junior meant more opportunities for friends and more facilities, plus the whole atmosphere of the school is focussed around a smaller age group so they don't get babied in the same way as infants.

Downside was having 2 DC meant 2 years of 1 in each (though the schools synchronised things like times).

We didn't have a great experience of infant to junior - the infant school was lovely, no complaints but moving up to the linked junior school we found it didn't work well for our DDs at all. At different stages and for different reasons we changed them out of there into other schools. I am sure however this was down to the school rather than the fact it was infant-junior system. Just be aware if you choose an infant school to be sure that the junior school it is likely to feed into afterwards is what you really want.

I think there are a lot of advantages to separate schools, but it's going to depend on the options in your area, there's no 'correct answer' that fits all schools. There are also some advantages to a 'through Primary'.
It would really make my list of "things that I thought were a positive" nor "things that I thought were a negative" about choosing a school.

It does depend .
One issue to consider though - my DS goes to a through Primary but the 2 other main schools in this are are juniors and infants. Parents have to go through the very stressful application process again for juniors and not all get to stay, especially if having a sibling pushed them up the list in infants but the sibling has left by the time they apply to juniors ( this happened to 2 of my friends). Around 2 or 3 from each school don't get a place in juniors, which I know isn't much but it must be hard if it's your child.