Geographical units of application were so large .
Candidates had to be prepared to work in a huge area of the country , or to compromise on their speciality since they were warned that making fewer than four choices would place them at a disadvantage .
Since geographical units of application were so large , candidates had to be prepared to work in a huge area of the country , or to compromise on their speciality since they were warned that making fewer than four choices would place them at a disadvantage .