Moving House before Reception!!!???

[ArkArk]

Hi All,

Really hoping for some advice/thoughts/experience.
We are currently in process of moving house -which is taking ages, stopped and started several times. DS is due to start local catchment school in Sept and has been given place. We have been at our address for 5 years, so all above board. I understood from initial allocation of places that if we had moved out of catchment earlier, the LEA could have taken the place away from him to give to a child waiting for a place in catchment.
However, now we are at the end of term/year and DS has done his 'taster' sessions, got the uniform, and his new teacher has sat in on SEN meeting my question is - if we move in August, before he starts officially in Sept, can they still take his place away from him when we turn up on 1st Sept? I have ploughed through LEA website but cannot find any clear information on this situation. We are not moving to manipulate school places in anyway, we are keen for DS to stay at the local school once we've moved. I feel so anxious about what could happen, I'm keen to discuss the situation with the Head and be upfront about our situation because we are not trying to be manipulative and I'm at the point where I want to know what we're facing if we do end up moving before school starts.
Any advice greatly appreciated, ta:-)