LONDON (Reuters) - A poll on support for Scottish independence found voters are split on the idea, with backing for Yes and No at 46% while 8% remain undecided, Savanta ComRes said on Friday.

       The poll put support for independence up 1 point to 46% and support for remaining in the union down 2 points, as backing for British Prime Minister Boris Johnson in Scotland fell further, dropping 16 points since October.

       The poll put Johnson's net favourability rating at -62.

       (Reporting by Kate Holton; editing by James Davey)