Hi everyone,
Now I've managed to get through Stage 3, I've got a copy of Graham Duke's book which I don't need for a while (the 9th edition). I'm happy to lend it to a fellow applicant if you're having trouble sourcing it - although Waterstones online are out of stock, I got mine from a local store - their stocks are different and it can be ordered from another store and sent to your local one if necessary.
PM if you want to borrow (as long as you return/replace it at some point in the next 5 months...).