Level one is taught seperately as an IFP course (under 16,s) only.
I teach level one and it covers absolutely everything apart from cutting hair.
If you go from 16+ straight into level 2 C&G you complete the level 2 course - but level one is covered in it without you knowing.
So yes to do level 2 to you will automatically be doing level one within the units if you go to a college.
A bit confusing but level 2 covers all units within it.
Level one covers structure of the hair, Blowdrying, Shampooing and how it works technically, colouring, Tint,foils etc, how the colour chart numbering system works and how colours work technically, setting,client care, body language and porosty tests, elasticity tests, treatments etc.
Level one (when seperate) basically teaches 14-16 year olds everything apart from cutting, and it is definately all the things you need to know for a basis in hairdressing, but under 16's will get a level one certification from city and guilds and once they leave school will only have to complete their cutting units and a few more observation assessments on perms and colours to qualify a level 2 certificate.
If I was your friend I would see if the college runs an evening level 2, so she can still work while doing the course, and maybe volenteer in a salon one day a week or so to gain more experience, and with that they should offer her a model night as well.
But dont worry about level one or two, irrelivent as she will have to do level 2 and all units are subsequently covered anyway, so it will be a 2 year course, but can do her units and assessments quicker, to save time, if she is naturally good at it.
Good luck, let me know if she needs any other help or advice.