The BAFTAs official site is broadcasting online the pre-show, click below to watch it:

http://www.bafta.org/awards/film/

And you can also watch online the red carpet arrivals and the ceremony here:

http://www.livestation.com/channels/10-bbc_world_news_english

Be sure to watch the Orange British Academy Film Awards on BBC1 tomorrow, February 21.
Check your local TV guide for exact time.

Kate will be one of the presenters!

Official site: Orange British Academy Film Awards