Air Berlin £204 return. But with only 2 flights a day no flexibility to change to a later flight if things overrun. Doesn't happen often but it does sometimes. I used Air Berlin last month on this route, a bit of a shambles organisationally, as I described here :
http://www.pprune.org/forums/showthread.php?t=215796
It's interesting that of the 4 fare examples I now have, they almost exactly reflect the convenience, or lack of, of the different arrangements for me.