Mazza - I think you should go to the Citizen's Advice and take their advice. It is free and usually good
You should take someone else - an org called ACAS says the results for workers are much better if they take someone ( other employee ) .
I think you should work on bulllying
and did you tell anyone about the redating at work ?
see here - it is quite clear - you should read the whole lot
https://www.gov.uk/dismiss-staff/unfair-dismissals
Somewhere on the 29 at the hearing you should use the words:
"I have been fired for whistleblowing and this is automatically unfair"