Since I've been looking for more information on this matter, I decided to check on the history of Sweden during World War II in my encyclopedia.
What I found is confirmation that there was indeed a British plan to send troops to Finland. However, what was implied was that sending the troops to Finland was also a cover to get at Sweden's ore production.
The plan was apparently about to be implemented but had to be aborted because Finland had surrendered.
Had this operation been launched, would Sweden end up in the Axis side? From what I've read, the government at that time had adopted a policy of strict neutrality but declared a policy of non-beligerency when Russia invaded Finland. The Swedes also had leased several merchant ships to the British.
Despite reading Sweden's history, I am not really familiar with Swedish military equipment during World War II. But I do know that the Swedish military is considered first rate.
Another question, if the Swedish military did end up on the Axis side because of this UK operation, how much of an effect could this be on the German military's efforts in this area?