I agree that the 180 degree term is a skill test item. but the CAA approch was a bit simplistic. As I saw it opon enter bad weather, the student should make a 180 degree descent down to MSA, if above MSA, consider which direction the bad weather is coming from based on form 215, consider the option for diversion, and request QDM's or radar.
The AAIB report on G-BIIJ, says it all.
I would add that on a cross country it is sensible to apply MSA for students or inexperienced PPLs. even in VFR. It also means you are less likely to be in conflict with miltary and rotary wing aircraft.