S2 Headlamp alignment

Just got the car back from failing it’s MOT, both headlamps are were below the minimum required.
The handbook clearly indicates on how to change the bulbs via the panel within the front wheel arch’s , but how do I adjust the height of the headlamp beam, is this something I could do or should I leave it to the people that know how to do these things.

My MOT tester is friendly but they do need adjusting :frowning:

AFAIK arch liners out, to remove the covers, then there are adjustment screw to do the adjustments.