Fave actress, hmmm, difficult, Fiona Shaw is always interesting, Meryl Streep can be incredibly versatile, can do accents, can look good or bad, you can beleive that she is good or bad, but I've only ever seen her on film.
Harriet Walter is also incredibly good, I've never seen Imelda Staunton be bad in anything but I don't know if I've seen her in a wide enough variety of roles to put her up there with the best.
Erm....................
Susan Sarandon is incredibly good on film, as are the Hepburns and Jodie Foster
Ha!! Thought - even tho' I have never seen her on stage I think Helen Mirren takes some beating for all round versatility.
But to go back to the original subject...................
Kathy Burke is ace!