I always say yes to the vacc, and if they did get something FeLV related, then i accept they wouldnt pay - but mine aren't done for similar reasons to Gill - they are both 14, and have had outdoor access before coming to me, so should have an immunity.
Out of interest, I think £6k per condition for oldies is fine, if I got to that amount for a health issue in one of mine, I Think I would be wondering what quality of life they had - but I wouldn't entertain it for a youngster.