Officially, it's not 'parking' which creates an offence (in areas where parking is controlled by the police and traffic wardens) or a contravention (in areas where parking is controlled by council staff). It's 'waiting' which can get you a ticket. Your actions would seem to amount to 'waiting' and therefore render you liable to be 'ticketed'. (You could try an appeal, based upon stopping in an emergency situation, but you'd need to show that you had reasonable cause for regarding it as unsafe to proceed any further, e.g. to turn into a side street).
As Jake has indicated, you also need to beware of 'no stopping' areas. As well as red zones, there are plenty of other places which are marked by a single extra-thick yellow line by the kerb. Where such a line is present, you're not permitted to stop even momentarily (e.g. to drop someone off) except in a genuine emergency (or, of course, outside of the hours displayed on an adjacent plate).
Chris