The reference in 4a made it particularly easy to single out the cipher, and solving it, was a different matter. It was fairly easy as an acquaintance of mine had already written a piece of code which could assist in solving (snip) ciphers. It was way easier than 3b, which I submitted about 20 minutes before the points dropped luckily.
The rather insulting phrase which is inserted on top of the solution strikes fear in all of us. Albeit I am not really smug, more fearful at the pace of difficulty this year has, compared to other years.
Good luck to all.