Will this mod (probably my favourite) be updated for 1.1? I tried changing the json file but it didn't work unfortunately.

Do that for both this mod and PlannerCore then change the first line of gui.lua in this mod to:
local mod_gui = require("mod-gui")

Thanks - worked a treat

not wer undurstand where need change to work?

not wer undurstand where need change to work?

You need to manually edit some files inside the mods. First unzip it to a new folder.

Then edit "info.json"

change the line: "factorio_version": "1.0",
to "factorio_version": "1.1",

next you'll need to update the file "gui.lua"
replace require("mod-gui")
with local mod_gui = require("mod-gui")

Next you'll need to update PlannerCore info.json
replacing "factorio_version": "0.18", with "factorio_version": "1.1",

Didn't notice there was a Factorio update (didn't play for a few weeks).

But there is already an updated version for this from ChucklesTheBeard called Outpost Planner for 1.1.