The principles and techniques of spontaneous prose in the stories of the modern English writer J. McGregor are considered. The novelty of the research is determined by the insufficient study of the specifics of spontaneous prose in modern literature in general and the principles of spontaneity in the stories of J. McGregor, in particular. The relevance of the research is due to the fact that the new narrative forms that take place in the works of modern literature require close study, the development of special decoding methods. It is shown that spontaneous prose provides the writer with an opportunity for various kinds of experiments that relate to both the form of the narrative and the content of the work. It is concluded that the main tendencies of spontaneity, which are realized in the stories of J. McGregor, are the following elements: polyphony, the presence of a second implicit narrative plan, imitation of the stream of consciousness in the external and internal speech of characters, creation of sketch images of heroes, description of events in the form of sketches, a narrative collage technique reminiscent of a series of snapshots or still frames. It is proved that all of the above techniques provoke many implications, give rise to various associations and are aimed at involving the reader in the process of interpreting the work, his active co-creation.