'I write standing up, at 5am': a day in the life of a bestselling author

There are flaws, of course. The middle section sags slightly, and a subplot involving a neighbour is introduced with some care and then simply abandoned. But these are quibbles about a work that is, in every important respect, alive.

It is also, and this should not be underestimated, very funny. The humour comes from character rather than jokes, and it arrives exactly when the tension needs releasing.

Nothing is wasted. Every shot, every line, every silence is doing something

The ending will divide people. Some will find it too abrupt, others too neat. I found it exactly right: an answer to a question the film had been asking, very quietly, from the beginning.

It is rare to encounter something this confident, this fully realised, that does not seem to be trying to impress you. It simply is what it is, and trusts you to meet it there.

A singular vision

Whether it finds the audience it deserves is another matter. But those who do find it will, I suspect, hold on to it for a long time.

It begins quietly, almost apologetically, and for the first 20 minutes you may wonder whether anything is going to happen at all. Then something does, and from that point on it is impossible to look away.