Dear John,

It was so exciting to cast my vote for Sian Berry to be the first Green Mayor of London this week - and I hope you can have a similar feeling either by post or on Thursday.

You probably already know - this election is different. It's Proportional. But did you know that there's 3 different voting systems on the same day?

Here's a quick explainer:

1) Pink - This will be for the London Mayor. You will have two votes - which means that no vote is a wasted vote. It is much safer to vote for Sian Berry as your first vote and place your safety net as your second vote.

2) Yellow - This will be for the West Central London constituency. This is Hammersmith, Westminster and Kensington and Chelsea. I’m your candidate for that - this one is tricky as it’s never been won by anything but one of the two big establishment parties. This vote uses the First Past the Post system.

3) Orange - This one is crucial. It’s the orange ballot paper which is for the 'Additional Member'. This system is Proportional and Greens can win. On this paper, you’re not ticking for an individual name but for the Green Party.

Other parties have been determined to make sure that people don’t know about these voting systems - so we’re making it our mission to make sure that everyone knows this weekend what and how they’re voting. Can you help us spread the message?

We’re going to be leafleting your local area for one final time in these elections on Saturday 1st May. We have lots to do - but the more people who volunteer, the less time it takes everybody. For one final time this election, can you spare 1-2 hours to come leaflet in a team? You can sign up here.

I’m so proud of how we have run this election. I really hope the next time I write to you it will be as a Green London Assembly Member and with a new start together we can make London the Greenest city in the world.

Let’s do this!

Zack Polanski

London Assembly Candidate

P.S. if you can help me on election day (Thu 6th May), we have a briefing on Tuesday 4th May of how you can join me and help on the day to get the vote out. Sign up here.