Please click the following links:
https://intranet.dft.gov.uk/section/me-dft/staff-handbook/part-terms-and-conditions-employment/a11-dispute-resolution
https://intranet.dft.gov.uk/section/me-dft/staff-handbook/part-b-associated-procedures-and-guidance/b11-dispute-resolution
If any links do not work, please contact HRadvice@dft.gov.uk