Well this is interesting,it being claimed bradly Walsh may be the new docotor assitaint...
Something that gives this rumor some weight is that Chibnall was a writer & exec producer on Law & Order UK series 1.
Though that might equally lend weight to the theory that someone has been back through Chibnall's credits and picked out an actor for the sake of having a story to write. Let's not forget how Kris Marshall was also but confirmed as the Doctor by the papers a few months ago.
That said, I think Jodie and Bradley could make a good team. He was good in
Law and Order
and was downright terrifying as a child-stealing entity in
The Sarah Jane Adventures
DE88 and BeanoMaster gave kudos