A helpful neighbour would discuss modifications of someone else's property - with the owner of that property - before carrying out a potentially life-threatening modification, surely?
I am sorry to disappoint you but unfortunately you seem unable to see the whole picture!
Your parents never had any right to discharge their flue over your neighbours land.
The neighbour has every right to do anything they like on their land like building a shed.
Certainly the neighbours were not qualified to modify the flue but thats not relevant, it should never have been there in the first place.
I have no axe to grind and I only look at the situation as you describe it. Its just the kind of ironeous argument my Mother would have used.
Tony
