The number of Avios needed to redeem awards will be directly linked to the cash cost of a fare on the flight you're looking to book. (travelingformiles.com)
If you don't have enough points to cover the full cost of the fare it doesn't matter — you just use your Prestige card to pay off the balance. (travelingformiles.com)
Uber says it will shoulder the cost of fares. (techtimes.com)