Can anybody explain why, if you've got PP, or an agreement from the council that something is PD, you would need an LDC?If you have planning permission for some development, there is nothing to stop you applying for a LDC at any time, whether the development has been built or not.
And I don't mean because some ignorant/venal council employee is trying to get more money from you, I mean an actual law or regulation which you have to obey.