You have to remember, this is the price of gas to be delivered tomorrow. That's only any use to you if you know there's going to be a significant current demand for it, or if you've got sufficient capacity to store it until later in the year.
As it's approaching summer, the current usage of gas is very low and, as we all know, the government took the sensible and far-sighted decision to close our main storage facility five years ago. Therefore, because current usage is low and storage practically non-existent, the price for delivery tomorrow is also very low.
If you remember during the early stages of the pandemic, the spot price of US crude oil went negative for a while, as there was literally no demand and it was more worthwhile for dealers to pay someone to take it off their hands, rather than incur the costs of receiving and storing it.
When we all want to use gas, however, is during late autumn and winter, starting about 6 months from now. The price for delivery in 6 months' time reflects the fact that the whole of Europe will want supplying with more gas then, so is much, much higher.
That said, I agree entirely with the comments regarding the ridiculous decision to close the storage facility, which has exposed all of us to the extremes and volatility of the market for something which is essential. Markets only really provide a solution for goods/services which involve discretionary spend. Life's essentials require heavy regulation and central planning.