Looks like the Court of Appeal case is to be heard on 24/10/2017:
Case
Reference: C1/2017/1930
Title: The Queen on the application of DA & Ors v The Secretary of State for Work and Pensions
Type: Appeal
Appeal / Application:
from the order of Mr Justice Collins
High Court of Justice Queen''s Bench Division Administrative Court dated 22-Jun-17
Hearing Status: Fixed on 24-Oct-17 – estimated length (in hours): 10:00
Venue: London
Constitution:
THE PRESIDENT OF THE QUEEN''S BENCH DIVISION
LORD JUSTICE MCCOMBE
LORD JUSTICE MOYLAN
