None of us are perfect. However, the issue seems to be fairly straightforward. HSE have acknowledged that the factual information provided to them by our glorious employer was substantially in error, and is still under review. Consequently, HSE's assessment contained in their report - that the screens are on the limits of acceptability - is quite wrong. The situation is much worse than the report suggests. There is no other conclusion to be reached. "The patient is pregnant".
Let's try again. NATS gave the HSE fundamentally incorrect information. HSE have drawn a conclusion from that information that gives a substantially misleading view of the true state of affairs. The screens are in clear breach of the DSE Regulations.
To use Take3's words, the screens either conform to the regulatory standards or they do not. All you engineers who appear to be so put out by ATCO complaints posted on this forum have a simple solution. Don't ask 300+ users what they would like (because they don't know - they are non-professionals in such matters), just apply the standards that are clearly laid down.
Not too difficult, is it?