Millions of us rely on the Tube to get around London. But how much do you really know about London Underground? Total passengers? Busiest station? Average speed? Test out your knowledge below.

QUESTIONS

1) How many passengers use the Tube network each year?

2) What's the total length of the Tube network?

3) Which is the busiest station?

4) What's the average speed of a Tube train?

5) How much of the Tube network is in a tunnel?

6) How many escalators are on the Tube network?

7) Which station has the most escalators?

8) How many lifts are on the Tube network?

9) What's the highest station above sea level?

10) Which is the furthest station from central London?

ANSWERS

1) 1.34 billion

2) 402 km

3) Waterloo (95.1 million a year)

4) 33 kph

5) 45%

6) 423

7) Waterloo, 23

8) 196

9) Amersham (Metropolitan Line), 147 metres

10) Chesham (Metropolitan Line), 47km to Aldgate

Source: TfL