Well Your friend needs to visit his local Job centre plus and inquire about jobs in ground operations.
Like most jobs he/she will have to fill in an application form and go for an interview if successful.
If he/she gets through this stage he/she will have to pass a security check and then bobs your uncle.
I'v just gone through this process and i'm due to start my job as a baggage handler on Monday the 1st of July.
Hope this helps
Dave