You can book a taxi via following methods:
Online: http://www.fleettaxis.co/
Telephone: +44 125 256 0999
Yes, it's possible to pre-book a taxi with Fleet Taxis - 01252 560 999, please contact the company.
Fleet Taxis - 01252 560 999 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.