The UK isn't blocking Tesla FSD (Supervised). Nobody has applied. Over the summer I asked the DfT and VCA through FOI requests and my MP. What the written answers say: 1. The route is open. VCA, 10 July: "It is now possible to type approve such systems" under UN R171. GB already approved Ford BlueCruise hands-free in 2023, using its own version of the Article 39 route the Dutch used for Tesla. 2. The Dutch approval doesn't carry over. DfT, 9 July: Article 39 decisions "do not apply automatically in Great Britain". Applying "would be a decision for Tesla". 3. As of June, Tesla hadn't applied. Asked for any record of an application, the DfT said: "not held". 4. Minister for Roads, 9 Oct: R171 is set to go into GB law, with later versions accepted automatically. And the VCA "would welcome early engagement" from makers approved abroad who want cars evaluated on British roads. The door is open to Tesla, but they need to actually apply.