Sky's crime correspondent Martin Brunt, who is in Portugal for the McCann family libel trial, says Madeleine's grandmother is among those set to give evidence:
#madeleine McCann first witness at libel trial will be documentary maker Emma Loach, daughter of film director Ken Loach.
#madeleine Other McCann witnesses will include their private investigator Dave Edgar, solicitor Angus McBride and Kate's mum Susan Healy.
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It is hoped the 7,400-mile journey will become a cost-efficient and time-saving way of transporting trade between China and the UK.
The Prime Minister said Parliament will be given a binding vote on the final deal, but said the result will not stop Britain leaving the EU.
Officials from the train drivers' union Aslef will meet managers from Southern Railway, whilst the RMT will meet separately with Acas.