Any turns will be announced over the radio.  Tail End Charlie (TEC) is the only vehicle which needs to respond.  Even if TEC responds, radio transmissions are not always reliable so we each look out for the car behind us.  When you come to a corner, put on your indicator, or wait just through the intersection if proceeding straight ahead.  Do not move off until you see the car behind you also put on their indicator (or flash their headlights for straight ahead).  Do not assume they have seen you.  You do not have to keep the other cars in sight all the time, especially if there is dust.