Might be reading too much into it but I'd suggest it's a sign that something will happen sooner rather than later... another reminder tonight via Facebook to update your contact details would suggest to me that the club is trying to ensure everyone who can vote is able to ahead of more information being released.
https://wst.org.uk/wp/?p=1465
If you're not seeing emails drop into your inbox, then make sure you check the WST have the right info for you. If you've not turned out to vote before, this is the time to start.