Labour
The current Mayor's predecessor was Ken Livingstone and he was a member of the Labour Party although they didn't support his campaign to become mayor.
Yes, Boris Johnson is a Conservative.
He does not have a political Party because he is the mayor of Burnaby.
democratic party
democratic party
Democrate
Mayor Boris Johnson of the conservative party
Mayor Richard T. Crotty is a Republican.
Sometimes. It's not required.
Shirley Franklin is Democratic
London, and the United Kingdom, does not have a president. On the other hand, the mayor of London is Boris Johnson from the Conservative Party. The Prime Minister of Great Britain is David Cameron, also of the Conservative Party.
Carmen Cruz is known as the mayor of San Juan, Puerto Rico. She became the mayor January 14 2013. Her political party is the Popular Democratic Party of Puerto Rico.