www.makemkv.com

I have just tried to rip Man of Steel UK version and Makemkv comes up with the error
The volume key is unknown for this disc - video can't be decrypted
Failed to open disc
Using LibreDrive mode (v01.0 id=489CDFD6D392)

Did you email the file to svq@makemkv.com for processing?

I have now, was unaware I had to do this, relative noob to this sort of stuff.