The voice over person you seek is Christine Lahti.
the narration is by Ewen Macintosh (keith from the office)
I have been wondering this and the correct answer is Michael Mc Fadyen star of Ripper Street.
I think it's Samantha Bond.
I believe its Julie Walters.
Hetti Bywater
You can watch the Aviva shark/dolphin commerical on youtube.com
Richard Thomas
The voiceover is done by English Actor and comedian, Jake Wood.
Sweeney MacArthur
Anthony Hopkins
Tom Ravenscroft.
Gotta be Kelsey Grammer!
steve belford
Paul Whitehouse
Lance Henriksen (the "droid" from "Aliens")
jeff bridges
i think it is ellen degeneris sp?