Britain's Simon Archer and Anthony Clark have qualified for the men's doubles tournament at the World Championships in Anaheim. Archer, who won Olympic mixed doubles bronze at Sydney 2000, and Clark are the English national champions.
They join Ian Palethorpe and Paul Trueman as the latest qualifiers for the event on 15-21 August.
Compatriots Natalie Munt and Tracey Hallam were added to the women's doubles competition.
There was more good news for Kristian Roebuck, who has already qualified for men's doubles with David Lindley, as he was added to mixed doubles with Liza Parker.
Parker had already qualified to contest women's doubles with Suzanne Rayappan.
England's entries for Anaheim:
Men's singles:
Andrew Smith
Aamir Ghaffar
Women's singles:
Tracey Hallam
Elizabeth Cann
Men's doubles:
Nathan Robertson & Robert Blair
Kristian Roebuck & David Lindley
Simon Archer & Anthony Clark
Ian Palethorpe & Paul Trueman
Women's doubles:
Jo Wright & Ella Tripp
Gail Emms & Donna Kellogg
Suzanne Rayappan & Liza Parker
Tracey Hallam & Natalie Munt
Mixed doubles:
Nathan Robertson & Gail Emms
Robert Blair & Natalie Munt
Anthony Clark & Donna Kellogg
Kristian Roebuck & Liza Parker