English Defence League founder Stephen Yaxley-Lennon from Luton has been jailed for 18 months for mortgage fraud.
The 31-year-old, who has been known as Tommy Robinson, had previously admitted two counts of the offence at a hearing in November.
In an apparent comment on the sentencing at St Albans Crown Court, the controversial far-right figure took to Twitter to say "This is a complete stitch-up".
He also posted a picture of a meal of meat, mashed potatoes and chips, with the message "one last feed", and then "see u all in 18 months".
Robinson was accused of conspiring with others to obtain a mortgage by misrepresentation from the Abbey and Halifax banks.
Click below to watch a report from ITV News Anglia's Matthew Hudson
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Sunday forecast: Heavy rain is expected for a time with gusty winds, then clearing during the afternoon.
March in the Anglia region has been much drier and sunnier than normal although temperatures have been around average.
Breezy and rather cloudy overnight but mainly dry. On Sunday, becoming wet and windy for much of the morning after a dry start.