We were going to do that, but we've decided to try our luck on the ILE route, so my husband is flying to the UK to do the KOL test (crazy that even a high season return flight to the UK still leaves us quids in compared to the visa+ILR route
). I hope this loophole works out for us but in any case a trip to the UK for him is very useful in tems of starting to get things in place for our move.
So in the end, it worked out OK having a biometrics appointment next month! We decided to send in our younger daughter's UK passport application first and get that over and done with, so in any case some of our essential documentation is tied up there for the time being and this gives us time to get the KOL certificate and send it in.