The amount of fradulent documents included in university applications from places like (obviously) Nigeria, Pakistan, India and the Middle East is incredible. There's no training provided in how to detect them (Home Office should do this for international applications) and no time to follow them...
I think Plymouth University are probably feeling ever so slightly miffed about this programme. There's not a huge amount they can do to ensure the work are sent is written by the student that puts their name on it, if it is bespoke work. Happens all the time.