New Leaf was established in 2010 by a partnership of agencies, supported by the Buckinghamshire Association for the Care of Offenders (BACO). In 2011 New Leaf became part of Thames Valley Partnership, allowing them to expand the work into Oxfordshire and Berkshire with the vision of helping offenders across the whole of the Thames Valley.
New Leaf provides fully trained (volunteer) mentors to work on a one-to-one basis with clients over a defined period of time. Mentors help clients to plan and work towards their goals, and to overcome problems they might have along the way. They offer non-judgemental support, encouragement and advice.