My recollections of the restricted space at CCF, with 5/6 platoons on parade, was that the markers did a right turn before marching out 15. Then left turn, and were dressed in file by the "RSM" before "Contingent - get on ... Parade". At that point, some 150 would come to attention, 2-3, right turn, 2-3 and march 15, 2-3, into line left turn ... before being dressed as a full parade.
Our CCF took it so seriously that some us young JNCOs were sent on cadet drill courses with the Guards.
Remember the RSM's parade, Wednesday mornings at Kineton in the early 80's. HQ Coy (Staff Clerks), 522 Coy RPC, A Coy (AT's) , B Coy (Stackers), C Coy (AS OF A) & D Coy (WRAC). Oh what fun it was watching the right markers halt at different times, get sent back and finally jailed. RP Staff stood at the side of the square to march them awayyyyyyyyyyyyy!