There are many ways of offering support:

1-. The Floyd Family: https://www.gofundme.com/f/georgefloyd?utm_source=twitter&utm_medium=social&utm_campaign=m_pd+share-sheet

2-. Black Lives Matter:

Donations can be made directly to the Black Lives Matter Global Network, and their “ongoing fight to end state-sanctioned violence, liberate Black people, and end white supremacy forever”.

https://secure.actblue.com/donate/ms_blm_homepage_2019

3-. Other Victims: There are active funds for the many victims of racial violence around the world. https://blacklivesmatters.carrd.co/#victims

4-. To Fight Racism In the UK: Show Racism The Red Card is the name of an anti-racism charity in the UK. The charity provides resources, runs school workshops and uses high-profile public role models to educate people in Britain about ongoing racism. https://www.justgiving.com/theredcard