Thanks to those that have responded - sounds like I've a reasonable chance but no guarantee. I used to be fairly high up with points but couldn't justify platinum (which basically seems to be paying an annual premium for double points) and all the cup schemes so have slipped down the pecking order. With 40,000 season ticket holders, between those who have fewer points than me and those who don't want a final ticket, hopefully I'll be OK
I'm just glad I don't have kids because the price of a family day out, with travel, to both the semi and then the final, is simply outrageous.