The sheet music and computer simulated audio are now showcased for all those who may have already registered as a singer or may do so upon listening to Tim's fine arrangement.
Actions are in place to develop singers' practice material and distribute it to registered singers by the end of February, so... make sure you register before then... It'd be a great pity to miss out! Singer practise and recording is scheduled for the first two weeks of March. However, there's no reason why you couldn't start practising now if you're keen! Go for it.