If it's going to happen, it'll have to involve the Lib Dems "re-splitting" into their Liberal and SDP factions, and the SDP half becoming a safe-space for non-Corbynite Labour...
Why?
Then show us the evidence that the non-Corbynites are ready to flee for the Lib Dems, much less the Cons. (Though there *could* be an other-way-around situation, i.e. not the Lib Dems "re-splitting", but the majority of the Lab caucus splitting to create a sort of "SDP II" and maybe extending an arm out to remaining Lib Dems)
Incidentally, your current sig has certificate errors. Remove it, please.