The arse end of my omega was always trying to overtake the front, even in just damp conditions. Tyres were mid range, so that's probably why. Used to put the shits right up my missus, she having never driven a RWD.

The Omega is more stable than my carlton was at speed ,or maybe i just don't push the Omega as hard .
thinking about it , not checked the tyre pressures in a while, so will empty the boot a bit and check the pressures and test drive tomorrow,have to go shopping and to the oldies
I can then jack up the Omega and check all the suspension etc on mum's drive

and wash it ,as my daily exercise