A missed approach from the minima only has a designed terrain clearance of 100 feet. The clearance is allowed to be this low as it is classified as a "rare event". Common events require higher clearances to allow for variation in flying technique and standards. Because this is recognised as a less safe manoeuvre, most of Europe has some form of approach ban in order to prevent flying the approach to the minima with the probable expectation of then having to perform a low level missed approach.