Seabeck was a member of the MSF Union (now Unite), and while working as a researcher at the House of Commons became the secretary of the South Thames Community Branch.
In December 2010, it was revealed that Seabeck was under investigation by the Parliamentary Commissioner for Standards in relation to declaration of member's interests.
[15] At the 2015 general election, Seabeck again stood in Plymouth Moor View, but was defeated by the Conservative candidate Johnny Mercer.
[16] Alison Ward married Denis G. Seabeck (deceased) in September 1975 in the London Borough of Havering.
[4] On 5 October 2012, at the National Maritime Museum, she married Nick Raynsford, the Labour MP for Greenwich and Woolwich, for whom she had worked as a researcher before entering Parliament.