As it stands, Aviva offers the product and an UberX driver can very well have full $2M liability insurance.
An Uber X driver can have that policy but not all Uber X drivers. And until Uber X makes it mandatory for all drivers to get that policy or not be able to drive none of the drivers will purchase that policy as the costs associated with it are really high.
Again that is not a FULL $2M liability insurance.
That insurance policy only covers the drivers who are spending up to 20 hours/per week. (Which takes out the majority of Uber X drivers)
That insurance is also only covering drivers who have at least 6 years of driving under full G class license (Which takes out quite a few other numbers of Uber X drivers)
And this policy only covers from the time the customers enter the vehicle to the time they exit.
BTW I do not know of any Uber X drivers who have purchased the above insurance as the costs associated with this insurance are really high and majority of drivers do not qualify for it. Also as Uber says that they require all vehicles to have proper commercial insurance, at the moment Uber does not ban or limit any Uber X drivers for not having such insurance, they willingly turn a blind eye to it when drivers are applying to drive under the Uber X platform if commercial insurance is not provided.
The only FULL $2M liability insurance policy for Uber X drivers is the one that Intact insurance is working to create with Uber, other than that policy at the moment there are no other FULL $2M liability insurance that covers all Uber X drivers.