Is it illegal to receive assessors report before award letter? Will change of circs get backdated?

Hi all just a quickie so put in for change of circumstances, got my assessment report back today ,looks like I'm getting higg rate care and still no mobility, so I rang pip up man was lovely over phone and said decision not made yet but yoir assessment report as been looked at and it says for us to up the rate ,so good news he says ,I said by how much he said roughly £120 month ,which h is obviously higg rate care ,but then he said if not happy with award when it comes then I can go for mandatory consideration, bu other thing was he said we cannot send you your assessment report until a decision as been made ,but I was sitting there with mine in front of me it arrived today he said it was against the law ,so how does that work out, could I also ask any back date will that go from date of phone call to ask for form or date of them receiving it ,I did ask him but he was unsure any help much appreciated,