Originally Posted by
spotwelder
There is no IATA through fare from London to HMV, although there is a reverse fare from HMV to London return. Therefore, you were forced to be on two separate PNRs, at least that is your argument
It does not follow. Even if there is no through fare, it may still be possible to have a through ticket (with combinable fares).
On the jurisdictional issue, if you bought your ticket in Sweden for a Swedish airline for a flight within Sweden, I very much doubt that you will be able to start an action before a UK court. If you bought it in the UK or from a UK travel agent, you might conceivably fare somewhat better on that front.