I do a variety of jobs for a variety of people, some is self employed some on the books.
I keep a cheap diary with me & record all hours work & for who. I keep an index of employers, ( Name of employer, contact if relevant, phone number & address) each has a number & I write this number on both the rear of the chart & in my diary entry.
When I have been stopped I have shown this & handed over my tacho’s & exsplained how I do things, it’s simple easy to cross check & I’v never had any problems, in fact the only comments I have had from the VOSA / VI have been good ones.
If you work regular hours,( i.e. no over time paid,) just write all the relevant details on a sheet of paper & keep it with your tacho’s & if stopped & asked to produce your charts show this as well.