...Also, you have the choice of mix'n'matching parcels of shares, regardless of purchase date. That is, you man treat each share individually. Just make sure you keep very good written records of what you are doing.
...Also, I think in your case, where by you are forced to sell shares because you are leaving your job; you may be exempt from CGT if you roll over the shares. This sort of stuff gets really tricky; you best get some professional advice on that issue.
