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There was sufficient storage all through out last winter, and while the warm weather certainly helped in that regard, it was mainly gas market speculation that drove up the gas prices and resulted in record profits of the companies involved in the gas trade.
Assuming the situation will be a bit more stable this year, I guess it will not happen again to the same extend, but lets see.
That’s going to depend on what proportion of capacity the storage can meet, I guess - which will partly depend on the weather
Are there insights from which countries the tanks were filled up? Was it supplied with tankers from overseas or did they just purchase the Russian gas with a markup via transit countries?
This site has a lot of interesting and regularly updated information about the gas supply in europe: https://www.bruegel.org/dataset/european-natural-gas-imports