Evans presents the reader with a bit of a moral dilemma in this novel. The two principle characters are far better than most of the others and their relationship is one that develops during the course of the story, going to a place that neither would have thought possible at the beginning.
In a sense they are not fully formed people and only become so, individually and as a pair, once they meet up and put their 'talents' together. However, where they are successful, but only in the short term, is not exactly legal. In fact, if it wasn't that the Blitz was just about to start (prompting the evacuation of Noel from the centre of London and his subsequent billeting with Vera) and the attention of the authorities being diverted elsewhere, there's very little likelihood that they would have been able to get to the end of the story without a meeting with the judicial system.
But they're not the only ones who are dabbling in illegality. War provides a great opportunity for some people to strike it rich, from the arms manufacturer getting his fill from the trough to the little con men (and women and boys) at the bottom. As with all cases of corruption (even the kind that's considered 'legal') it breeds a feeling of 'what's sauce for the goose is sauce for the gander'.
Even in the favourable times of the war they aren't necessarily going to benefit. Others are more mean and avaricious than they are and what was seen as a nest egg gets used to save an equally immoral conman who, through his own arrogance and stupidity, put himself in a dangerous situation. An ungrateful and deserting mother makes St Albans not a welcoming place to stay (if it ever was) and our duo of heroes find their place in London, where an unrecognised inheritance makes life easier than at first thought, though why the need to resurrect the dead I don't know.
Evans bangs the militant suffragette drum by introducing two women (although by the time of WWII a little bit doolally), one who formed Noel and the other who brings back memories of the first, both of whom had medals of honour from the conflict with the authorities. Although Noel is obviously an intelligent young lad he hadn't imbibed the skill of analysis from all his reading as he trots out the mantra of parliamentary cretinism when he criticises Vera for not voting. The Suffragettes should have also fought for something to vote for rather than just the opportunity of marking a cross on a piece of paper – even the most illiterate can do than.
By the end of the novel they are both 'settled' in the way you can be during a war; the Blitz has come to an end and the tide will soon turn (with the sacrifice and efforts of the Soviet Union) but we can see that Vera is already thinking up other scams. Will there be a second book in this series?