Can you order a new one today saying you lost your old one or threw it out by mistake... Perhaps it would be inadvisable to fly in the meantime. Can you go to Gatwick and get re-prints on the 1 day service (I read about earlier on in this thread so think it exists but perhaps i just made it up)?
I really think they should add a line to the letter that is sent along with the licence saying don't cut it up. As I assume is normal, mine came with lines pressed into the paper which makes the scissors so appealing! For anyone else thinking about cutting theirs up, absolutely do not do it and if you must, at least use a rotatrim instead of scissors