Hi Guys,
Sea trout are notorious for 'coming short' at the fly just nipping the tail without hooking up.The 'Trailing treble' flies ie: Secret weapons were designed to increase the chances of a hook up when the trout are less confident of a solid take or simply nipping away at the fly's tail.
If you are in any doubt to the mess these hooks make in the fish's mouth ..fish barbless or crush the barbs on the fly.Most trout will be lip/scissor hooked and damage minimal.
As speycaster points out singles probably do the job just as well...Falkus's famous 'Sunk Lure' has accounted for many quality fish and is a Tandem tied fly-the rear hook a single.
http://www.aghilliestale.com
JOHN