Yeah just did a week at an agency.
I sent all pictures of the stuff they wanted over via email/wattsapp.
Signed some electronic documents via email.
Hand over my cards at every site, they photocopy them and then crack on with the job. Every day agency just drop me a text can I do this place for this much £ per hour.
Once you get the initial sign up paperwork done, then it’s just a quick wattsapp asking if you can go here or there (usually ok short notice/asap) or or for the next day.