I’ve just done one, and the planners were dreadful, but I got there in the end.
If you are a farm (I am) then you need to follow the prior notification system, it is very simple and easy, do your own scale drawings by hand and do not let them tell you to get architects drawings, you don’t need them and neither do they! (sore point with me).
Phone the planners every day and communicate by email and they will give in in the end, but they can be obstructive in the extreme and every day they invent a new rule, it is useful to ask them the part of the legislation that any particular rule comes from, as you’ll find most of the blocking techniques are made by self-invention and as such not permissible, but you need to be firm and polite and level toned in your discussions and you will wear them down in the end.
I could rant for hours about my experience, but better not, so good luck and although frustrating it should not take too long.
