Certain positions within GTR are classified as safety critical. Roles that fall in this category are all associated with the movement of trains, and for safety reasons are subject to certain medical requirements, based upon Railway Standards and legislation. If you are not certain that you will meet the standards shown below you should check, where possible, prior to starting the recruitment process. Your GP or Optician should be able to help with this.

Some management roles may also be deemed as safety critical, and this will be indicated on the role profiles when advertised.

Specific Medical Restrictions

Some medical requirements for safety critical roles are quite technical; however, your GP or Optician should be able to provide you with an explanation of the terms below.

Any medical condition that has the potential to cause
(a) sudden loss of consciousness,
(b) reduction in attention or concentration,
(c) sudden incapacity,
(d) loss of balance or coordination, or
(e) significant limitation of mobility
will be considered carefully in relation to safety critical roles. There are no absolute preclusions to application; however, Group 2 DVLA medical requirements can provide some guidance as to those considerations.

Vision Requirements for All Safety Critical Roles (also see Driver section below)

  • Distance vision of at least 6/9 in the better eye, with a minimum of 6/12 in the other eye. The use of spectacles or contact lenses is permitted to meet this standard
  • Unaided visual acuity shall be at least 3/60 in each eye.
  • Photochromic lenses are not permitted. Tinted lenses are not permitted for the purpose of meeting the railway standard. However, tinted lenses can ONLY be worn on the condition that they meet the requirement of BS EN ISO 12312-1:2013, including the requirement of Filter Category 2.
  • Applicants who have previously undergone laser eye surgery will be subject to additional investigations before fitness can be confirmed. This may include the provision of evidence from the treating medical professional.
  • Bifocal/Varifocal spectacles are permitted

Colour Vision for All Safety Critical Roles

Normal colour vision (using the Ishihara Colour Vision Plates Test), is a requirement.

Hearing Requirements for All Safety Critical Roles

  • Hearing loss must not exceed 40dB over frequencies 0.5, 1 kHz and 45dB at 2 kHz.
  • For roles where Personal Track Safety (PTS) is a requirement, hearing loss should not exceed 30dB averaged over frequencies of 0.5, 1, and 2kHz in either ear
  • No conditions likely to cause unpredictable fluctuations in hearing should be present.

Additional requirements for Train Drivers

Vision Requirement

The standard for safety critical working as above applies, with the following exceptions:

  • Distance vision of at least 6/6 binocular vision, with a minimum of 6/12 in the worst eye.
  • Near vision must be at least N8 binocular (with or without correction)
  • Intermediate vision must be at least N12 binocular (with or without correction)
  • Maximum corrective lenses permitted: hypermetropia + 5/myopia -8. If the candidate wears prescription glasses or contact lenses, they must bring the prescription with them to the medical.
  • No progressive eye disease
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