As you know, Jersey is adorned with current somewhere at some stage of the tide.
So, we learned to use it in a multitude of ways.
I've got to really get this stuff into a workshop but i'll try to explain
one method that could work on your described run.
There are tons of swing, backwind techniques etc but, though they are easy in
practice to show, nightmare to write down.
Lets look at the....
Dive, Dig and Rise.
Current running away from you or at a tight too angle.
First, choose a plug that will dive DEEPER than the actual depth.
Choose a deeper diving 10-12 cm long billed bait, maybe a Live X or
some type of crankbait styled bait with a medium dive bill. You want
a coffin nosed bill ideally so the deflection off the bottom is pronounced
and erratic. Sharpen the underside front of said bill for faster diving, deeper
digging.
The plug must be buoyant.
Cast, but cast high, VERY high pitch but not high as in (loads of line off).
Cast down the run, say 15 meters but, up at a high angle so 30 meters of line
might be off the reel. Aim: Make a splash to wake up a fish but maintain line control.
Do nothing but watch for a take. Still, do nothing. The plug will run out of line.
Depending upon the current, the plug will either dive down and smack the bottom
or, you'll need to sweep it down. It's best to really sweep it down. Right behind you
sweep the rod horizontally to the water.
BUMP ! plug hits the deck hard.
(A) Slowly....
bring the rod around your body with the braid JUST slack.
This allows the plug to rise slowly but still travel backwards in current.
The actual amount of current determines how far the sweep, how fast the rise etc.
Let the plug surface and WAIT. Not long though, a few seconds.
Then, bail off. Sweep the rod back behind again to release X amount of slack.
Bail on. follow the plug backwards in loose contact.
Sweep hard down....
Bump and repeat the above from (A)
Hope this helps, it does work. Just keep choosing slightly differing lines and keep trying.