Leave will be allocated pro-rata, in other words you are not entitled to 42 days if you exit the company in May. There is some arrangements with the Banks to make, worth talking to HR about this as we hear tales of accounts being frozen after resignation, etc etc. You need at least 2/3 days for the final exit procedures so trying to micro manage the exit to coincide with 5 years and the bond is not a good strategy. Email some recent leavers if you have contacts for the heads-up..if you think joining was a challenging try leaving the hotel california!