Tacho time question

We don’t have set days, its always Mon - Fri and lets say you get Mon off the first week, the following week the day off would be moved to Tue, and the following week to Wed etc.

We never work weekends always 4 days between Mon - Fri

So just to be clear, I can put myself on an agency and work that 1 day off in the week?

I am not interested in working any weekends so there’s no issue on that note.

Thanks