Hi Killbot99,
I was in the same position as yourself, got the three month extension to return my form, I wish I had returned mine sooner like you have, i don’t know what happened in my case but in absence of the form, they sent my case to IAS on the 17th June ( my form had to be in by the 5th July which I did) and I had my assessment on the 29 th July so approximately 5 weeks in my case, my assessor was from Newcastle and I live in Scotland, it’s so random, so who knows, just wanted to share if it gives you any peace in your mind, the waiting and not knowing is the hardest. Kind wishes.