Probably already mentioned, Jim White mentioned on talksport that acposdivle swap with Barkley was being muted. If nothing else, this unsubstantiated rumour could force Spurs to enter the fray and make a bid for Barkley.
As for siguardsson as much as I admire him as a player, he's not worth 50m. Swansea quite rightly don't want to lose their best player, but we all know were the power lies in football. If siguardsson wants to come, he'll need to force the issue as no club will offer what Swansea are demanding. That will weaken swanseas bargaining position as they will have an unsettled player at the club who wants to leave.
If we don't get siguardsson, I'd go for giroud and tierney.