Tomorrow's vigil smacks of the sort of thing which will be crawling with pigs who are eager for a fight, so please familiarise yourself with your rights and this constructive advice from Green and Black Cross if you're going. https://greenandblackcross.org/guides/key-advice/
Key Advice when Going on a Protest | Green and Black Cross

Key Advice when Going on a Protest | Green and Black Cross
Key points for safely interacting with the police:
No Comment - you do not have to answer police questions, whether in an "informal chat" or interviewed when arrested. If arrested, you are within your rights to give a prepared statement and then answer "no comment" to everything else.
No Personal Details - if stopped and searched, you don't have to give police personal details, do don't. If arrested, you don't have to give personal details. Mass arrests and stop and searches are a means for police to do intelligence gathering. Don't make it easy for them.
Under What Power? - whenever police are doing anything, ask this question. Note down their answers. And this isn't a conversation. Once they've answered you, the conversation is over.
No Duty Solicitor - duty solicitors are basically cops. If arrested, don't use a duty solicitor. Here's some good lawyer suggestions. Choose your solicitor now, remember their name and number, just in case you get arrested and need it. https://greenandblackcross.org/solicitors/#criminal
Solicitors | Green and Black Cross

Solicitors | Green and Black Cross
No Caution - if you're arrested, police will often offer you a caution, which basically means you admit guilt without them having to actually do anything. Unless advised by a (good) solicitor, do not do this.

And finally, this is very important. If you're going to the vigil, don't post about it on social media. DEFINITELY DO NOT POST PHOTOS. As far as your digital footprint should look, you were not there. This keeps you safe, as well as others.

A little personal tip: schedule some posts about drinking a cup of tea at home for the time of the vigil.

Also, wear a mask. There's corona about and the weather is cold so keep your little nose warm.
If you think this information doesn't apply to you because you're not some sort of anarchist radical, remember that we live in a country with very vague laws on the right to gather and a police force comprised of rapists, abusers and those who enable them. This is information to keep *you and those you love* safe https://greenandblackcross.org/guides/key-advice/
Key Advice when Going on a Protest | Green and Black Cross

Key Advice when Going on a Protest | Green and Black Cross