I think this article pretty much sums up the fishyness of the whole incident :
https://www.google.co.uk/amp/s/www.telegraph.co.uk/news/2017/05/25/michael-barrymore-paid-two-witnesses-not-give-evidence-pool/amp/
So unlike most people who would be absolutely mortified that some poor person died on their property, at their own party, Barrymore basically does a runner - the police suspect that he tried to get rid of something, we will never know.
If the allegation that Barrymore did indeed pay off witnesses is true, I think we can just say that is a very strange thing to do.
Refreshing one's memory with some of those articles, it's fair to say, homophobic undertones aside, Barrymore's behaviour that night, certainly shows a complete disregard for the man who died, his family, and worse, that he was trying to hide "something".
The article above is pretty recent, it seems like the suspicion still hasn't completely gone away...