Lucy Letby police are being urged to investigate hospital bosses for corporate manslaughter. Key medical expert Dr Dewi Evans has told the Guardian and the Observer that hospital bosses were "grossly negligent". He said: “They were grossly negligent. I shall write to Cheshire police and ask them, from what I have heard following the end of the trial, that I believe that we should now investigate a number of managerial people in relation to issues of corporate manslaughter. “I think this is a matter that demands an investigation into corporate manslaughter. The police should also investigate the [hospital] in relation to criminal negligence.” He added: “Failing to act was grossly irresponsible – let’s make it as clear as that. We are talking about a serious emergency. It’s grossly irresponsible and, quite frankly, unbelievable [that they failed to act sooner].” READ MORE Alison Hammond pays sweet tribute to co-star with T-shirt on Florida holiday Slater and Gordon, which is representing two of the families involved, said: "The inquiry announced by the Department of Health is inadequate. As a non-statutory inquiry, it does not have the power to compel witnesses to provide evidence or production of documents and must rely on the goodwill of those involved to share their testimony. "This is not good enough. The failings here are very serious and an inquiry needs to have a statutory basis to have real teeth." Former Countess of Chester Hospital NHS Foundation Trust chief executive Tony Chambers, who was in charge at the time, said he would co-operate "fully and openly" with the inquiry. Dr Nigel Scawn, medical director at the Countess of Chester Hospital, said in a statement on Friday: "Since Lucy Letby worked at our hospital, we have made significant changes to our services and I want to provide reassurance to every patient that may access our services that they can have confidence in the care that they will receive." But he walked away without answering as a journalist asked: "Why did hospital managers try to stop Lucy Letby from being investigated?"