I don't agree that it's "beyond question". At best it's arguable.
Here's the key conclusion from the judgment:-
"It is clear from the legislation underpinning the NPPR that the charge is constructed in a way expressly designed to ensure that the revenue achieved is attributable entirely to the local authority. It mandates that the collected funds are steered in one direction only – locally and away from central government. To conclude in these circumstances that the charge is in reality a national one, as contended by the appellants, would be contrived and artificial and contrary to the intent of the statute (namely the Local Government (Charges) Act, 2009). The legislature is the architect of a framework specifically engineered to ensure the resulting revenue stream flows directly into the coffers of the local authority. If anything, central government is deliberately bypassed to allow local authorities to be the collectors of the generated proceeds and are indeed empowered to prosecute defaulters. The government’s involvement is effectively to design and sign off on a system which takes it out of the loop and distances itself from what to all intents and purposes is a tax or charge levied by the local authority."
1. Is LPT "constructed in a way expressly designed to ensure that the revenue achieved is attributable entirely to the local authority"? No.
2. Is LPT "steered in one direction only – locally and away from central government". No.
3. Is LPT "specifically engineered to ensure the resulting revenue stream flows directly into the coffers of the local authority". No.
4. Are local authorities "the collectors of the generated proceeds". No.
5. Are local authorities "empowered to prosecute defaulters". No.
6. Is LPT "to all intents and purposes is a tax or charge levied by the local authority". No.
I certainly agree that LPT should be deductible but it's a bit of stretch, in my opinion, to suggest that this judgment puts the issue "beyond question".