I probably will be honest because I’m superstitious about these things, but just interested in views 
The company I work for has switched to a new holiday booking system as of 1 January. I went to book a holiday yesterday and the system is showing I have my full annual allowance, plus five days carried over. I did indeed carry five days over, but I booked off the first two working days of January (using the old system). This hasn’t been tracked to the new system.
Should I be honest and retroactively book off those two days, or do I enjoy an extra two days off? 