Apply in-year primary admission 2022/23 via the Achieving for Children Google Form for both my kids, hoping to get a place allocated for them starting late Jun/early Jul. The form says do not apply more than 4 weeks before expected arrival. So that means we should apply in early June?
Yes - apply for a Year 5 place for your son and a Year 6 place for your daughter, emphasising you need a start from X date. State Schools in Richmond break up 21 July so ideally they would get a few weeks, but places will be allocated at whatever school has places in those years, not necessarily schools of your choice, and not necessarily the same school. However you may find the process takes longer than expected, especially if all schools are full and Richmond have to do some negotiating to get them in somewhere, so it might be the case that allocations don't happen before the end of the academic year.
I saw that In-year application for 2023/24 will only start in June. So I have to apply for my girl's Year 7 in June? By that time, can I still apply for 2022/23 in-year as mentioned in (1) above?
The Yr 7 application is different, as it is a transfer point and allocations were made a couple of months ago - applications closed last year. You need to apply for this asap to get yourself on waiting lists, and for Richmond to start the process of finding you a space somewhere if schools are all full. Again, at this point you will get allocated a place somewhere but it's unlikely to be a school of your choice, but you can stay on waiting lists.
LA admission people - how do I contact them? I sent an email to the richmond.admissions email and I have not received any reply
Unfortunately that seems to be the only way, aside from the in-year form.