Nicola,
If you are being serious?
I would think that Richard Faulds is convenient to you and he certainly has more than enough experience to improve you overall.
With regard to the Trap disciplines, Fred (40UP) is a wonderful source of improvement, although he would possibly protest that he is not a coach, he certainly is a font of knowledge, has an eye for detail and is obsessive on continuous improvement.
Someone else who could possibly improve your ability in all of the disciplines you personally mentioned and profess to shoot 'at' would be Graham Evans.
But maybe you have inadvertently highlighted a basic flaw in your ability ?
Do not shoot 'at' targets, place your shot pattern into the path of the departing clay. You do have far more time on a target than you think.