Originally Posted by
SuloL
Now I appreciate that HEL is also an airport with its own design deficiencies and not best suited for such an elaborate system due to lack of space among other things
The Non-Schengen gates in HEL have been planned to work well with priority boarding with separate holding pens for priority pax. Even if you would enter the holding pen just before actual boarding starts, you will get onboard before anyone in the standard boarding groups.