Booked appointment is for Thursday, but just thinking ahead in case there are delivery delays...cheers
You could always ring the sort centre once it arrives and pick it up yourself if you are short on time. I nearly had asawa do that because it took just as long to get to Philippines from the UK as it did to get it delivered from the sorting centre which was less than 5 miles from her house!
Just realised you can change it on visa 4 uk website where you submit application. Just go to view biometric date and edit it. Friday wasn't available for standard service but I could choose vip lounge and Friday was available. It didn't forward me to payment page so I assume that's paid in cash.