I guess the article is an example of how someone wants to try their hardest to connect two things that have hardly any contact points. The Brexit will certainly give us a period of uncertainty about many future regulations, but there's no reason to expect any substantial changes to the gaming industry. Buying games in the UK may be affected, but I even doubt that, because both sides cannot really afford any trade blocks.
And there's no expectation that Turkey will join the EU in the foreseeable future. If they keep up their speed with fulfilling the requirements, they may be on target for 2070.
Regarding immigration, the majority of immigrants to the UK is from outside the EU, not inside. They already have to jump through a few hoops, but it's not that difficult to get in if you have some qualification.
And there's no expectation that Turkey will join the EU in the foreseeable future. If they keep up their speed with fulfilling the requirements, they may be on target for 2070.
Regarding immigration, the majority of immigrants to the UK is from outside the EU, not inside. They already have to jump through a few hoops, but it's not that difficult to get in if you have some qualification.