Italians and job/traineeship seeking in London : passport required?

title : Italian graduates and job/traineeship seeking in London : are italian ''documento di identità'' and EU driving licence enough? Or is italian passport required?
Good evening.
My question relate to post-brexit requirements for italians in London seeking for a job.
As I know until march 2019 all rules remain the same for EU citizens.
So, is it possible to do a traineeship in London for an italian graduate with a EU driving licence and a valid ''Documento di identità'' until march 2019?
Because I red some job posts in the web and they are starting to require an EU passport for non UK citizens.
Thanks for the answer.

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