Which British English word is used for the American English word "elevator (of a building)"?

In American English, the word "pants" is typically used to describe outerwear worn over the legs and abdomen. What word is used in British English?

She got a great price on her flat. What is the American term for "flat"?

Which of the following is a noun commonly used in British English which is used in American English to signify an Elevator?

When a British person is knackered, what is s/he feeling?

In American English, the word "football" is used to name a sport played with a lemon shaped ball and large shoulder pads. What sport does the word "football" identify in British English?

In American English, the word "Caravan" is often used in association with gypsies and carnivals. In British English, what does this word identify?

What is the British English equivalent of the American English expression "blow (or toot) one's horn"?

Which of the following is not commonly used as a past tense or past participle in British English? 

What is the British English equivalent of the American English expression "sweep under the rug"?

There are some differences in pronounciation between British and American English. In American English, the h in the word "herb" is not pronounced. Is this the case with British English?