{"algorithm":"Ed25519","canonicalization":"JSON con chiavi ordinate (sort_keys), separatori compatti (',' ':'), ensure_ascii","payload":{"verdict_id":337,"claim_id":350,"claim_text":"The previous Conservative government let the UK's last ammonia plant, based in Billingham, close in 2023.","label":"vero","confidence":0.9,"explanation":"CF Fertilisers UK announced on 25 July 2023 the permanent closure of its ammonia plant at the Billingham complex, which was the UK's last domestic ammonia production facility; the site has since relied on imported ammonia.","sources":[{"url":"https://www.cfindustries.com/newsroom/2023/billingham-ammonia-plant","ente":"CF Industries (company)","titolo":"CF Fertilisers UK Announces Proposal to Permanently Close Ammonia Plant at Billingham Complex","estratto":"CF Fertilisers UK announced a proposal to permanently close the ammonia plant at its Billingham Complex (July 2023)."}],"issued_at":"2026-07-01T07:52:35+00:00"},"signature_b64":"+sl2x2TjMbiw4Egtp8k6sQ0SLU5mEl+bqpOKfBF7Q7iUXNFhovki+156h0XBrYy5WIaXvJ8udDxBZFrsqsRtBw==","public_key_hex":"1719e2638a2cc0ec8d552d71dca52197f934e0a66b17e6364f1eed7a1d428e01","note":"Verifica offline: ed25519_verify(public_key, base64decode(signature_b64), canonical_json(payload))."}