Fiction Adaptation - Novel exercise

Upon request I pitched the novel Spies by Michael Frayn something to the effect of the following:

Some novels excel in one area character, plot, language or style but some novels are great because they combine all of these elements. Spies is one such novel, winning the whitbread novel of the year 2002.

The plot of the novel entails the childhood journey of the character Stephen Wheatly from the narrative perspective of  a version of himself 50 years since past the told events. Set predominantly in England engulfed in the second world war. Stephen along with childhood friend Keith, the two young boys suspect Keith's mother of being a German spy. Although the lead character is a child the novels predominant plot is added to by secret tales of filming marriage and affairs. Only revealed by looking past the child like innocence of the witnessing characters.

There are a lot of questions left unanswered by the end of the novel. The death of a character referred to as Uncle Peter towards the end of the novel would be an element that I would consider changing if I was to attempt to adapt this novel as the ongoing affair, post war life and continuing narratives of the adult characters is something In pondered and is alluded to both at the beginning and end with no answers given.

With what I know of lottery funded films I would suggest that the tone, content and themes would make Spies a strong source and contender for adaptation. Therefore I would recommend that it would be broadcast on Film 4 to bring this intriguing plot to a new and wider audience.