What you quote is correct. However, there's one really bad thing to the legislation that changed a while ago. You have to wait two months after you have applied as stated, but you don't have to wait for a response! If, after two months, you receive no reply you can assume that it is ok to continue with the work!!!!

"Erm ... sorry, but I posted a planning request two months ago ... honestly ... didn't you receive it? Oh well."