As a party member for many years, Shaka is one of the most promising candidates. She has taken Brent from a place it wasn't so credible to a much better local party. It's still not got a Councillor but I have no doubt Shaka is candidate material having led a small by election team which included visits from Sian and Greens of Colour as well as local and neighbouring members.
Sian is of course the most popular candidate by a long shot and has focused on getting on with the job whilst maintaining as realistic as possible expectations as a credible alternative to the incumbent Mayor of London. Sian has supported local parties such as Gipsy Hill and is great at pioneering a green offer for when it comes to competencies such as housing and police.