The below has been my concern for a long time when we have a big bunch cycling on a two lane scenario and we then have to do a right turn and cross a lane to do so.

Three examples spring to mind eg
# when we are going to Gordos Bay and enter the Beach Road
# when going to The Strand and do a right turn at the Golf Club to go along the beachfront
# when going along the Firgrove Road and just over the bridge we do a right turn at the robot

Ideally , the guy at the back should SHOUT LOUDLY if there is an oncoming vehicle coming...or shout " ok "

The other concern in this scenario is that EACH CYCLIST is responsible for his own safety AND DOES NOT cross the lane without ALSO checking BEHIND BEFORE CROSSING LANES

Hertzel