Re potential warped discs.
Had it checked out today at Renault and had all discs checked for run out and said to be fine well within tolerance.
Then told theres no vibration at any speed and made me look a right charlie.
Recently had two new tyres fitted and after 5 attempts from various tyre depots thinking I'm paranoid again got them bang on, apparently they had all been balancing them the wrong way for the type of alloy .
So the vibration has dissapeared all together over night and no realize that the wheel nuts had not been correctly torqued to the right tension and been causing the wheel not to sit true on the hub. But Renault before testing checked for run out which was fine but then correctly tightened the wheel nuts to the correct torque.
Hey presto no vibration.
The moral is it took me five attempts to get them to balance 2 wheels and a trip to renault to find out theres nothing wrong but poor workmanship.
upgrade which has seemed to make car far more responsive.
For once good oold renault!