The first decision is expected in time for the deadline for candidates to file their nomination papers to stand in the General Election
Up to 30 Tory MPs are set to learn if they will be charged with electoral fraud at 11am today.
Prosecutors are due to make an announcement on files they have received from 15 police forces before Thursday’s deadline for candidates to declare whether they will stand in the upcoming election.
A Mirror investigation revealed last March that two dozen Conservative MPs received help from battlebuses packed with party activists during the 2015 general election but failed to declare the cost.
In a follow-up report a six weeks later, Channel 4 News identified a further handful of Tory candidates accused of similar failings.
All deny wrongdoing but face up to a year in jail and an unlimited fine if found guilty of offences under the Representation of the People Act.
The Crown Prosecution Service has confirmed that it received files from a string of police forces but not the number of individual MPs facing possible charges.