<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by Setjet:
They have endless booking codes, a general rule of thumb is: The higher the number, the higher the priority (R2, R4, R8, ect).</font>
It is (was?) the other way around with the
R priorities: R1 is the confirmed holiday flight with a priority comparable to a paid pax ticket while R2 is the regular ID standby priority.