I've been subjected to 3 medical checkups in my career as a Tech.
Most firms require a general checkup including eyesight/colourblindness, hearing, and perhaps a disclosure on your part of any significant health problem, hereditary or otherwise. A tick the box list for the HR dept.
In practice, it won't be as in depth as Flight Crew...
Report back to us what they required, RR might push you for an IQ test!
(Only joking
)
Good luck
BAe146???