No, I believe all employers can only hire 16 and over and even 18 and over in some establishments, unless apprenticeships or work experience.
It would depend on the contract, school leavers are acceptable I believe
It’s illegal for anyone under the age of 16 to work in a contact centre.
No. 16 years and over. Same as most companies.
No, they can't
No in firms. they have to have their national insurance