What is the best way to move around London?
Hands down, the best way to move around London is by underground. For this, your best option is to get an Oyster Card for a short visit. Also, a good way to go around the city at ease is to ride a Hop-on Hop-off bus, since you will be able to stop at the most relevant areas of interest. As a general rule, you want to avoid getting a taxi if you can avoid it.