Can I sue my employer for deliberate false statements made during an investigation into my conduct. The documents have been shared widely.

I was under investigation for various allegations.

Some of the staff made deliberate false statements about me and events.

One member of staff was telling people I was going to kill them and my employer did not act on this.

As a result the documentation has been shared across multiple divisions and I have been awaiting redeployment.

I have suffered serious professional harm to my reputation and to my ability to find employment in other employers in our local area.

I have been off sick for many months and have developed a severe depression, anxiety and self harm with suicidal ideation.

Can I sue my employer for the professional harm (Defamation/Libel/etc) as well as the harm to myself?

Many thanks