The British govt are most definitely not considering entering any embassy to force arrest. Period.

According to a TV interview today, the extradition requests from Sweden have been considered by UK courts but...... oddly the charge of rape has not been indicated.

I'm not suggesting any kind of conspiracy theory but there's alot that just does not add up.
I also totally agree with John in that the solution lies with the Swedes to state no extradition to USA or any other country.
After all it's Swedish law that is allegedly in question, not UK law nor EU law nor US law.
According to reports on the legality of the charges, there are no such laws in UK or Europe that would have been breached even if the charges are found true.
So why would Sweden want to even consider extradition to another country?

The whole issue of extradition laws and balance of requirements needs to be looked at imo.