You can book a taxi via following methods:
Telephone: +44 170 873 7499
Yes, it's possible to pre-book a taxi with Farm Taxis, please contact the company.
Farm 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.