Don't know why anyone would be having a go at Flint here. He's only doing his job, and doing it very well given the extremely poor quality of the material he has to work on. If he happens to be so good that the jury find his client not guilty then clearly the jury are a bunch of *$%£wits. We can surely rely on the judge to balance the fact that the evidence is clearly in the prosecution's favour.
The one worry I have is the lack of any real evidence that a murder has occurred - it's just very suspicious when a body is disposed of in this way.
Except that I'm not sure he is actually doing his job well: surely the defence can't be both versions: either that he accidentally caused her death and he dumped her in the cesspit to avoid manslaughter charge OR that Nick and Joe really did exist and the defence is based on this storyline, But he can't have it both ways!