Hi songbird57
I'm afraid I can't tell you what to do here. As you say, you have read conflicting views, and you will certainly find that some people write no change simply because they hope they will avoid any questions being asked about their condition.
This is not people trying to cheat; I mean people who are in the same position as you, where their condition has deteriorated, but they already have an enhanced award and want it to continue, no questions asked.
Some people believe it is better to tell the DWP that their condition has worsened, even though it won't make any difference to their final award.
The claimants who are hoping for an increased award will generally add more details.
In the Guide to PIP claims and Reviews (which includes ADP) we advise that even if you are ticking no change, you still add a couple of sentences to confirm what hasn't changed, rather than say nothing at all. However, at the end of the day, it is up to each person to decide, and I reiterate that you will always find people who will say one way is better than another.
BIS
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