On a purely analytical point of view I do think it is looking like some of the turnout / "yes" votes are starting to decrease.
For example this is for Northern:
Eligible
Voted
Yes
Ballot 1
3,199
2,409 (75%)
2,145
89% of Voted
67% of all
Ballot 2
3,422
2,601 (76%)
2,440
94% of Voted
71%...