Part-time training (fewer than 32 hours per week) will help aspiring solicitors with caring responsibilities or other obstacles to full-time training.
Lubna Shuja, president of the Law Society, said five firms were now part of the scheme, the other two being Eversheds Sutherland and Osborne Clarke.
Malcolm Headley, training principal at Bates Wells, said: ‘Diversity of experience matters to us.’