LONDON (Reuters) -Chile’s Codelco, the world’s biggest copper miner, is offering to sell copper to European buyers at a record high premium around $235 a tonne for 2023, a rise of 85% from 2022, two sources familiar with the matter said. The premiums set by state-owned Codelco for physical delivery of copper, paid on top of the London Metal Exchange contract, are seen as a benchmark for global contracts. Codelco in London declined to comment. “Many European consumers don’t want Russian copper, they have to look elsewhere,” one of the sources said. “The copper market is tight and self-sanctioni…