Extending my British visa

Annoyingly, my British Ancestry visa runs out about 4 months before we want to move to Australia. So, while also getting together seemingly millions of forms for my Aussie visa (more on that later), I've also had to get everything together to renew my British one. We are on our way to Croydon now to apply in person (for the low cost of £867, yikes!), in the hope that there will be no complications and it will be sorted today. It should be fairly straightforward, however border agencies are notoriously picky (rightly so, I guess) and I am feeling quite anxious about the whole thing. Fingers crossed!

Mrs Wandy McNoble