Non-EU (Brazil) to Schengen via UK : immigration

Howdy! I simply tried to name the airline for this query and the attendant was fairly clueless.

I must go to Sweden in 1 month. I’ve the allow for Sweden and I will be allowed entrance. My challenge right here is learn how to get there. Thus far I’ve two routes: both by means of Switzerland or by means of UK. Whereas I do know that the previous is feasible, I choose the latter as the prices could be greater than halved.

So my query: am I capable of transit on UK to Sweden with out quarantine even when I’m coming from a red-light nation? Since UK is non-schengen, I suppose I will not must cross on border management? I attempted to provide a very good search, however the gov.uk web site was fairly inconclusive.

Thanks!