Pretty much expected. In UK who has the best deals wins. XB had great deals last week on top of the launch week of the Slim and it won, now PS4 is back on top thanks to deals on original models.
Too bad that last week some people made a huge drama and now this week we won't see half of those people posting here
Btw and this seems to apply for the US as well, the Pro is having a stronger success with preorders than expected, the Slim is basically not getting any sales from core gamers and traditional upgraders right now since most are waiting for the Pro. So with deals on original PS4 units coming to an end I can see overall PS4 sales slowing down in October just to explode in November with the Pro launch and the introduction of better deals for the Slim with more interesting bundles for the mainstream market (COD, Watch Dogs 2, FFXV).