@Alexandra2001, you're mixing up electricity and energy again. You seem a bit confused about the market, I'd start by reading that UCL article I linked to.
^There is.... if you like an auction for electricity prices.... europe wide.
Just as NS gas isn't actually exported and then re imported, its still sold at the relevant rate... just like electricity.^
This is incorrect. There is no Europe-wide rate, there is no Europe-wide day-ahead rate or spot price, settlement happens at a national or sub-national level. Have a look here. There is a degree of trading which is based on price flows between interconnected markets. But it isn't a single market
Interconnectors can only ever make up 7GW of our needs, and operate on congestion pricing (differences between market rates at either end of the interconnector.) You can't store electricity at scale currently so that electricity needs to be physically dispatched. So yes, the wholesale price in the country at the other end of the interconnector will have some impact on our wholesale price but only if the electricity at the other end of the pipe is cheaper than the highest UK price or if we're in a supply crisis. It explains why the French drought had an impact on our prices.
The EU has targets for interconnectors (15% by 2030) but that's not the same as a fully interconnected market now. Greater interconnection is likely to even out prices more but could have some negative impacts for us - greater connectivity between Germany and France, for example, at a time when Germany is closing more of its coal plants could drive up the marginal cost of French electricity that we'd want to import.
Different markets also have different input and output costs, including their structure (and ownership) of their transmission and distribution networks and where those costs fall.
Renewables? again years away before we even get to 50%.
Nope.
Price for nuclear is stable.... to the wholesale market... what the consumer is charged is another matter... again set by the "market...
Yes, that's exactly what I said above. The price is (currently) set by the last and therefore most expensive electricity despatched to meet the demand. Everyone then gets that price. That's why nuclear and renewable generators have made windfall profits this year despite the fact that their generating costs haven't increased. There are two ways to solve this - one, less reliance on imported fossil fuels, and two, change the way the market works so that other factors are in play such as location and time of use.
The market is really complicated and parts of the European market are interconnected, but it's not a single market like gas and therefore different countries need different solutions.
This year has been something of a perfect storm - drought affecting the hydroelectric and nuclear dominated countries while gas prices affecting those of us more exposed to that market.
It underlines the advantages of having secure, relatively price-stable generation locally and having an ambition to be a net exporter in a more interconnected future European market, of investing in energy efficiency (the lowest cost electricity is what you don't need to generate in the first place) and developing more flexible grid models with distributed storage.
And none of this really tackles the core issue of this thread, which is our current huge reliance on gas for heat - only the Netherlands is more reliant on gas for heat, I believe.