There is still scope for them to come 3rd.
The last polling of significance is a few days old, and the LibDems were still advancing.
Worth remembering that Remain were predicted to win on the last predicted polling but the gap carried on narrowing. It's the same here.
Maybe you can have too much of what you want ? My pecking order is
GET THE TORIES OUT (not massively fussed if Labour do it)
then
CRUSH REFORM TO ZERO SEATS
NIGEL FARAGE LOSES FOR AN 8TH TIME
LIBDEMS BECOME THE OPPOSITION
Although if the LibDems do become opposition, it rather solves the Reform issue. They can fight it out with the Tories where no one cares.