Seaside is a member of the Women's Flat Track Derby Association (WFTDA).

[2] The league began practising on Canvey Island, and had fourteen skaters by early 2010.

[3] It played its first bout in April 2011, when it faced the Norfolk Brawds.

[4] In June 2012, the Seaside Sirens were accepted as a member of the United Kingdom Roller Derby Association,[5] while in October 2013, they were accepted as a member of the Women's Flat Track Derby Association Apprentice Programme.

[7] The team were officially disbanded in 2018 following a shortage of players.