Nudge in the direction for the definition of a selfemployed archaeologist.

[P Prentice]

from hmrc
As a general guide as to whether a worker is an employee or self-employed; if the answer is 'Yes' to all of the following questions, then the worker is probably an employee:

• Do they have to do the work themselves?
  
• Can someone tell them at any time what to do, where to carry out the work or when and how to do it?
  
• Can they work a set amount of hours?
  
• Can someone move them from task to task?
  
• Are they paid by the hour, week, or month?
  
• Can they get overtime pay or bonus payment?
  

If the answer is 'Yes' to all of the following questions, it will usually mean that the worker is self-employed:

• Can they hire someone to do the work or engage helpers at their own expense?
  
• Do they risk their own money?
  
• Do they provide the main items of equipment they need to do their job, not just the small tools that many employees provide for themselves?
  
• Do they agree to do a job for a fixed price regardless of how long the job may take?
  
• Can they decide what work to do, how and when to do the work and where to provide the services?
  
• Do they regularly work for a number of different people?
  
• Do they have to correct unsatisfactory work in their own time and at their own expense?