How do I bathroom / kitchen / extension? etc.

How did it go with the neighbour's objections in the end?

Think it's fairly safe to say that situation is ongoing, so it's a huge relief to get a positive result on the planning. Time for an awkward conversation to find out what their thoughts are in light of this. May post more details later, but right now I'm almost completely unsympathetic to their circumstances.

The planning thing was a bit odd. Architect forwarded an email from the officer a couple of weeks ago, which requested that a) the extension on the rear be stepped from the side wall by an excessive-sounding 400mm, and b) that the new extension and terrace didn't extend more than half the depth of the existing rear extension. Given that the total depth is just under 8m, there's no way that could reasonably accommodate both new extension and terrace.

I was aware of a couple of very similar projects which had been approved so forwarded them to the architect. He seemed to agree that the request for the stepping in was odd. Only real difference was that their terraces were ~0.5m further back from the rear wall (and smaller in area) than our plans, so was expecting that we'd be forced to compromise in that respect.

Got the decision email yesterday and noticed that amended drawings had been added. Thought it a bit weird that these had been submitted without me seeing them, but the only concession was to step in the side of the terrace. Apparently he'd had a 'discussion' with the officer regarding the prior approved plans which went very much in our favour.

Getting permission for the dormer plus rear extension was pretty much a formality given the amount of precedence around here, but the terrace definitely wasn't. It's only since covid that Haringey have become more sympathetic to the owners of first floor flats in the area, still not allowed on houses. Incredibly happy to have got these plans approved, feels like a big win.