You can book a taxi via following methods:
Online: http://www.yellowlinetaxi.co.uk/
Telephone: +44 190 831 1114
Email: info@yellowlinetaxi.co.uk
Yes, it's possible to pre-book a taxi with Yellowline Taxis, please contact the company.
Yellowline Taxis has both regular and air-conditioned taxis, please mention your preference at the time of booking.
Please contact the company on their helpline number to make any changes.
Generally drivers will meet the passengers at the arrivals on airport pick ups but do check with the company.