"These Downing Street Christmas parties must be LIT if they're worth constantly bringing down their own government."
A total of more than £1m was claimed by more than 110 peers, despite them not making any spoken or written contribution.
MP will appear in Court on 22 March.
Channel 4 News investigation focuses on PM's chief-of-staff, Nick Timothy.
"Senior managers line their pockets with student fees."
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He's thought to be worth around £10 million.
The embattled MP says he 'believed' the claims were within the rules.