Although MI5 is releasing a biography written by Christopher Andrews, a Cambridge historian, the book is still an official and authorised work. This means that MI5 has the ability to omit details and to manipulate Andrews’ writing, encouraging the reader to place a certain amount of trust on the book and subsequently MI5. It has been acknowledged that Andrews' opinion has not been edited within the work, however the authorisation of the book by MI5 shows that they have some influence. As Andrews’ is an outside academic that researches MI5 activities and has been allowed to write this book it seems that MI5 will have had a choice in the matter. As MI5 chose the author, was able to edit and the book has consistently been in the hands of MI5 we cannot fully trust the book. Thus we cannot fully trust the organisation just through the release of this book.

MI5 has always been seen as a secretive service, although it is officially a security service, its early ventures into seeking out German spies relied on its secretive agents. The creation of MI5 was to protect Britain and this organisation has continued to work to help seek and establish plots of terrorism against Britain. With the release of the facts and figures of MI5 the trust of the service will be diminished. The exposure of such a large security service means that it is placing itself in a vulnerable state and open to attacks for its practices. In this sense we will not be able to trust the company, as it will be itself exposed for what it is and may make the country insecure opposing its true duty.

Any personal files and actions taken by MI5 may aggravate past rebellions and those personally affected by the organisation's actions. These exposures of personal files can lead Britain to turn against the organisation rather than trust it. Although the book includes both successes and failures of MI5 those that were successful actions will be both praised and disparaged. It is these disparages that create a larger impact on the trust of the organisation. Britain will highlight the areas of failure but also some of the successes may cause concern and rebellion therefore leading to a distrust of MI5.