I am just about to complete a lengthy tour in the sand. I took the precaution of submitting Gen App to PSF at my home unit to carry over annual leave before I deployed knowing that I would be out here when the new leave year started. I chased it up when I was on RnR. I just checked JPA and it seems that I have had all my leave from last year (more than 15 days) carried over and, what with PODL and the new lot of 38 days, I can go leave for just about the rest of the year !!
If you ask the question and justify the reason, people do listen - at least it worked for me