UPDATE 1-Top Cadbury investor says Kraft needs to raise bid

* Top 10 investor says "8 pounds plus" offer hard to reject

* Says Cadbury board right in rejecting Kraft offer

* "scramble for calculators" if bid near 9 stg -2nd investor

(Adds top 25 investor, Gamco comment)

By Raji Menon

LONDON, Nov 9 (Reuters) - A top shareholder in Cadbury (CBRY.L) said investors in the British confectionery firm would find it hard to turn down an offer of more than 8 pounds a share from U.S. suitor Kraft (KFT.N).

North American food giant Kraft has repeated the cash and shares terms of its original approach, which Cadbury rejected two months ago, and took its bid, which is 4 percent less at around 7.10 pounds after a fall in Kraft shares, directly to Cadbury shareholders. [ID:nL9380032]

The top 10 investor, who declined to be named, told Reuters on Monday: "They need to raise the bid from here to be successful."

"If there is 8 pounds ($13.42) plus on the table (per share), it is going to be difficult for Cadbury shareholders to walk away from that -- but that's not what's on the table at the moment," he said.