An intriguing political experiment conducted by BBC’s Newsnight programme has concluded that Plaid Cymru could be the most popular party in at least one inner London district.
Da iawn Mabs. 
Dw i’n siwr nad oes unrhyw sail i’r si ar led ar y maes bod Newsnight yn cysidro beidio darlledu’r eitem achos na chafodd y canlyniad disgwyledig.