From Heathrow Airport, you need to take the underground and change at

Green Park, there you take the Victoria line (southbound) and get off at

Brixton. Once there you need to cross the road, turn left, first right

and look on your right-hand side for number 18,

From Gatwick Airport, you need to take the Gatwick Express to Vitoria.

Once there, take the Victoria line (southbound) to Brixton. Once there

you need to cross the road, turn left, first right and look on your

right-hand side for number 18