Self employed status

[haslar]

Hi
This is my first post since the revised version of this web site.

Can anyone tell me what is involved and what documentation is required for a person to be self empolyed in the electrical field.

My daughter and her partner (a qualified electrician)are coming over to Torrevieja in September and is considering the self empolyment route to work.
Any information would be greatly appreciated

Thank you
haslar