As far as I can remember, they didn't have any collaboration with Cambridge directly. The CAOS project had failed - the US developers Amiga engaged simply fail

As far as I can remember, they didn't have any collaboration with Cambridge directly. The CAOS project had failed - the US developers Amiga engaged simply failed to deliver anything working, so they needed something in double quick time. MetaComCo in Bristol employed Tim King who'd previously worked with TRIPOS at Cambridge. He thought they could port that in time, which they did. It's that changing horse last minute that gave AmigaDOS all the BCPL weirdness in dos.library, whilst everything else had an elegance and consistency. Learning it was a very last minute hack let me forgive them. :) In the terminal it was actually really nice to work with.