Yes. It is still illegal.

To make it legal. You need to apply license turn your car into a commercial passenger car.

Something like your insurance is now business type insurance. More expensive. Frequent car safety checks at don't know where. Etc etc. Then you are legal to use your car to fetch people.

It's not about uber is illegal. It's about the cars used are not properly following procedure .

Getting caught. You cannot renew road tax for your car ever again. At least that's what my memory serves.