For example, if the cct direction were to change due to WX and you're flying a left cct... would you make a 180
There are a number of ways of doing this, you
can just take off and (subject to Air Traffic being happy with it) do a 180. I would suggest until experienced that the best way is to take off, climb to the normal crosswind turn height then turn in the
new circuit direction then in the same direction at circuit height, this will put you on the dead side going in the right direction then to turn crosswind into a normal circuit for the new runway - as pointed out though, many airfields have local rules and or glider/helicopter circuits in the opposite direction and these all need to be looked at first. (why not ask your instructor who should know WIHIH at your field)
