Bootie
The MK3's are about £20 million and the asw/asuw all singin'n'dancin Mk1's are in the £40 million bracket.
Are they worth it? well yes, if you have ever had to sit in the back of a Sea King pinger, getting covered in OM15, doing grid sprints between the active sonar and passive sonar positions. Stripping sonarbuoys out of poly bags with your aircrew knife, with another grid sprint to ditch the thing over the side and back to the table to see if it works or not! (Don't forget to tidy up before you sit back down) With the new, easy care MK1, it's one chair with lots of screens and a 'scrinson' that ditches the buoys for you. It just has to be a winner!
The Mk3 is pretty much in the same vein. Lots of space and a nice clean interior; and it goes fast.
This dit is short on an explanation of capabilities, I know; just sticking up for the youngster!!