Place your bets!

From the article:

Keir Starmer, the director of public Prosecutions, said there was "no realistic prospect" of a conviction, because of a conflict between the two postmortems carried out after Tomlinson's death last year.

Is that really the crucial 'reason'?

I seem to recall that the first postmortem was considered quite suspicious at the time and was certainly challenged strongly by the second.