Mr. Christopher is particularly renowned for his expertise in microsurgery and has a special interest in functional and structural penile problems, as well as male infertility. He has been a pivotal figure in the development of advanced phalloplasty techniques and is deeply involved in pioneering work in this area.

His professional affiliations include membership in the British Association of Urological Surgeons (Andrology section), the British and European Society of Sexual Medicine. He also serves as a reviewer for esteemed medical journals such as the Journal of Sexual Medicine, British Journal of Urology International, and Asian Journal of Andrology.

Mr. Christopher's clinical interests include Peyronie's Disease, penile and genital reconstruction, erectile dysfunction, penile prosthesis, male infertility, and all genital pathology.