score:7
No, the logic is quite clear, the rule applies to a person. Having several short-stay visas from the same or from different countries in the area would not help either, the visa conditions (including whether you need one or not) and the duration of stay are two separate things.
Formally, it would however seem possible to alternate between three months in the UK and three months in Schengen area indefinitely, even with only one citizenship and multiple entry visas for each country. But border guards in either the Schengen area or the UK could still become suspicious about the real purpose of your stays.
Upvote:0
It is possible; I have been doing this for over a year. I'm holding two passports and in most of the borders they don't check your dates, even in Denmark or Sweden. I had some questions in Portugal and I finally got caught in Poland crossing from Kaliningrad, but they let me go because I'm not doing anything illegal. Since I have been out of the Schengen area after 90 days with my passports and doing visa runs. I was in the immigration office waiting for over an hour while they were arguing about my situation, but I didn't get any paper or report about it and they came with me to the bus.
The only advice that I can give is if you are travelling you need to do this: imagine if you need to do a visa run after 90 days, you need to go to a country where you have a visa with the other passport. So you go out of the Schengen area, stamp the first passport, then go to the next country and get the stamp with the second passport, enter and exit, then go back to the Schengen area. It is not suspicious because you are coming from a country that you already have a stamp. But if it happens like me, where I went to Kaliningrad, I had to stamp my first passport because I didn't have a visa with my second passport, so the exit from Poland was okay, and entry and exit to Russia the same, but when I tried to get back into Poland they realized that I didn't have the stamp from Russia and in that border is the only country that you can come from, so they asked me for my other passport and they saw all the time that I was coming and going from the Schengen area. But as I said, I didn't have any major problem and now I'm in the Schengen area again.
Upvote:1
Legally, no, the rules are for a single person.
Practically speaking, you could probably get away with it though, because visas and databases assume that passport equals person -- although if anybody ever does get suspicious, it wouldn't take long for them to figure out that there's a clone with the same birth date and biometrics.