Does Norway overlaps with Britain or not?

[Jana]

...but an older Mesolithic link that can be found in the Iron Age Brit shared with Norwegians.

This is the answer I was looking for

[Black Wolf]

Have read how Norwegians picked up some Celtic elements, but not sure how significant it is. Since new studies on British Isles show Scandinavians left little genetic imprint (except on islands if not mistaken), did it work the other way? Or not?

How close or distant are Norwegians to Brits compared to other Scandinavians and Icelanders?

It depends on where in Scandinavia you are looking. Yes Norwegians tend to show some relationships with Brits and that is mainly because it was Norwegian Vikings who settled in parts of Britain mainly in the Western and Northern Isles of Scotland. On the other hand Norwegians also took back native British salves to Norway at various points in time during the Viking Age. There is probably a fairly significant amount of Danish Viking blood in parts of England as maybe Scotland as well. Now when it comes to Sweden there is probably not as much Swedish Viking influence but there probably is some as the Norse certainly did move around quite a bit. On the whole Sweden tend to share more links with Finland and the Baltic but then again there were also many Finns who have settled in Sweden over time as well. A lot of all of this shared ancestry may point to more distantt shared pre-historic roots though.