I  am to land at the airport in the night and am confused between the taxi companies to book with. I am travelling with kids and want to know the reliable taxi company to book with. If anyone can suggest me if they have used any of this.

https://www.expresscouriercars.co.uk
https://www.croydoncar.co.uk
http://www.bookride.co.uk

Also how long will it take to reach the hilton hotel in the city from the airport and what should be the minimum parking I should pay.

Thanks