The relevance of the study is due to the global digitalization and search for tools and practices fostering the process of doctoral students` training for independent quality research using the full range of available digital tools. Digital skills require continuous improvement. Thus, this article is aimed at identifying the possibilities of using mentoring for digital literacy development of British PhDs. Using comparison and terminological analysis the research considers the changing phenomenon of mentoring under the influence of information and digital transformations, identifies important digital skills being developed by doctoral students in the process of mastering the programs offered by UK university libraries. It is also justified that today librarians serve as mentors and can effectively develop digital literacy of doctoral students. The materials are valuable for doctoral students, teachers, mentors, academic librarians who provide professional development programs for researchers working with digital research tools.