Toby Reuben

Hi all, Just wondering, my partner has a year working holiday Visa which was granted in July 2015 but circumstances changed here in the UK with work/finances etc. Now we're thinking of travelling out together both on WHVs, but perhaps around September time due to financial issues. My question is, obviously this is not an emergency or health issue so her IED wouldn't be extended, but if she was to miss her entry date, is it still possible for her to apply and pay for another working holiday visa to be granted once hers has expired, or do you only ever get ONE shot at a WHV in your lifetime regardless of whether you actually activate it or not? Hope this isn't too confusing, thanks again to anyone who might be able to help us