If Lappi goes to Citroën I think the chance of Meeke going to Toyota is quite high (50%). As I wrote before I don't think they need to use money on any test. Since they know exactly what they are getting and he is not in position to demand anything and there is No doubt that Yaris is fast.

It all depeneds on how much risk they want to take. It can turn out very well with Meeke "stabilizing" without pressure on him, or it could implode completely and he could start crashing when Tänak is much faster than him and also cause Latvala to start to crash cause he tries to match Meeke's stagetimes between crashes.

In both cases PR coverage, specially in the UK, is quaranteed. Possible crash expenses are imo not a problem for Toyota (might be for Tommi), it's the title(s) that are at stake. Maybe if Toyota get both titles this year (or look set to get them) they might be more willing to go for it.