In Qatar you don't submit your visa application directly to the UK embassy. You have to submit it to UK Visa Application Centre located near Toyota Tower.

Below is the website, address and telephone numbers of UK visa Application Centre. You will find all information on their website.

http://www.vfs-uk.com.qa/

UK Visa Application Centre
Sherif Building,
5th Floor,
Opposite Toyota Towers,
P.O Box 76,
Doha, Qatar
Helpline Number: 00974 4622159 / 00974 4621544