Kinda disappointed in my new expensive NI Revalidation DP Logbook. There's 15 pages that hold 15 days each. You're suppose to cross off the lines you don't use at the end of a hitch. So working 21/21 there's barely room to collect the 150 days needed, a bit more if working 28/28. But then where do you document the next four years before you renew?
I've had my IMCA book for 12 years and with room for seven hitches per page it'll hold another two years.