Abigail has written for television, radio and stage.
Her TV writing credits include the new series of Tracy Ullman's Show on BBC1, Watson and Oliver (BBC2), the BAFTA-nominated Sorry I've Got No Head (CBBC) and the BAFTA-winning That Mitchell & Webb Look (BBC2).
The couple live together in Kilburn, London.
Do the pair have children?
Abigail and Robert have two children together.
Of parenting daughters, Robert has said: "Parenting girls makes you quite gender-conscious.
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"It’s almost impossible to fight the power of pink.
"It’s not such a terrible thing to want to be a princess when you’re five, but it would be nice if there were some other options."