Medical test what dose it involve

Been told I have to have a medical test work at a heritage railway but because I do train dispatch the rail regulator has said we are like mainline stations classed the same and have to have a medical unless you already work on mainline and have already had one said it would be around 30-45 minutes long what do they test is it just eyesight a d hearing

If they're are comparing it to mainline, which is a safety critical role, then it will probably be:
Drugs and alcohol screening
Hearing
Vision
ECG (maybe)
Medical history etc etc.

When I did a heritage medical it was nothing like a main line medical. It was just a chat with a GP who had volunteered their time. I believe they tested for diabetes via urine, asked about medical history, did an eye sight and colour blindness test. There was no hearing test, no ECG, no drug test, no weight check or anything that required medical equipment as it was just done in a random meeting room. Not a very serious medical by any stretch of the imagination. Of course all organisations will vary.