Might I take a controversial approach?
Stick it down as whatever you fancy, if the CAA disagree when you next send off your logbook for an endorsement then they will have to tell you what it should go down as. Then you change it. If they say nothing, it's not a problem. Christ, you pay enough money for that piece of paper, why don't you let them do the donkey work?
Cue all the purists....
A38