I caught TB from my pet cat

[magical thyme]

8. it's not widely used in the US for several reasons...

BCG is not generally recommended for use in the United States because of the low risk of infection with Mycobacterium tuberculosis, the variable effectiveness of the vaccine against adult pulmonary TB, and the vaccine’s potential interference with tuberculin skin test reactivity. The BCG vaccine should be considered only for very select persons who meet specific criteria and in consultation with a TB expert.
http://www.vaccines.gov/diseases/tb/

I just woke up and realized this is the UK. Here's tb vaccination info from NHS. Pretty much the same as the US:
"It's not given as part of the routine NHS childhood vaccination schedule unless a baby is thought to have an increased risk of coming into contact with TB.

This includes all babies born in some areas of inner-city London where TB rates are higher than in the rest of the country.

BCG vaccination may also be recommended for older children who have an increased risk of developing TB, such as:

•children who have recently arrived from countries with high levels of TB
•children who have come into close contact with somebody infected with respiratory TB
BCG vaccination is rarely given to anyone over the age of 16 - and never over the age of 35, because it doesn't work very well in adults. It is, however, given to adults aged between 16 and 35 who are at risk of TB through their work, such as some healthcare workers."
http://www.nhs.uk/Conditions/vaccinations/Pages/bcg-tuberculosis-TB-vaccine.aspx