Miriam, I think you are right.
Tim won't be up for eviction unless they use the old 'he's missing his girlfriend so much' line. (And Timothy, I suspect mummy might have told a porkie to keep you happy last night)
In which case it will be Jade and Alex or Jonny. Or Both.
Here's how I think it might go:
Kate will possibly vote Alex and Jade (she didn't like it that the others thought she fancied Alex)
Jade will vote Alex and Kate or Tim
Tim will vote Jonny and Kate or Jade
Alex will vote Jonny and Jade
Jonny will vote Alex and Jade
Therefore:
Alex = 3/4
Jade = 3/4
Kate = 0/2
Jonny = 2
Tim = 0/1
So, I predict Alex and Jade