Thanks ncrawshaw, I noticed in the "Woodlands and planning legislation" article that "there are reduced PD rights for holdings less than 5 hectares".
We're only looking at 4-5 acres, so would be subject to this, although exactly how this works doesn't seem to be clarified anywhere.
Apart from shelter-building for fun, I was expecting to be able to put up a small shed to store a few tools, wellies, Kelly Kettle etc. From what I've read, it looks like even this could perhaps be a problem.
Anyway, when we do get the woodland, I'll follow the steps recommended by people here and hopefully will not run into any problems getting the go-ahead for a shed.
From what I've been reading so far, one thing that I don' t like, is the thought of being constantly visited and checked up on by people to check we're not secretly building a house (which wouldn't be that secret in 4 acres!) or totting up the nights we've spent in the woodland to make sure it's not over 28.
One of the reasons we are so keen to get our own woodland is to escape from everything and enjoy being close to nature in the peace and quiet, do some painting, birdwatching, reading etc and I hope we'll be able to do that without being pestered.
Has anyone had any experience with that happening at all, or am I worrying over nothing?