Most of the time shallow is the way to go, but you will need a ripple, free line with 0.12mm to start or 0.14mm if your bagging. it's full of F1's but is putting some ide in there.
You have to use their feed pellets, 3 or 4mm are the best option use 3mm if you can.
or the expensive option is with worm on the hook and feeding caster. if the fish are not shallow then on the inside with maggot or chopped worm and caster is the best option.
shallow I use white hydro and a soft black hydro for the inside as there are some big tench in there to 5lb.
A bomb to the island is also not to be ignored, hair rigged corn on the hook. loose feed to the islands they are only 16mtr- 20 mtr away at most.
Hope this helps, by the way 15th is a friday