BeLeave founder Darren Grimes has begun his appeal against a £20,000 fine imposed by the Electoral Commission.
The Conservative Party saw a sharp fall in donations at the start of the year, figures show.
Labour’s grassroots campaign group Momentum has been fined over £16,000 for multiple breaches of electoral law during the 2017 general election.
The Labour Party has been fined £12,500 by the Electoral Commission over failings to deliver on time and accurate reports about donations.
Arron Banks and others associated with the Leave.EU campaign have been referred by the Electoral Commission to the National Crime Agency for alleged criminal offences around donations
The pro-Brexit campaign was found to have misreported its transactions during the referendum campaign
The Electoral Commission will look at whether the group went over spending limits and if it submitted accurate records
The Electoral Commission says it has received more than 1,000 complaints, with allegations that some young people voted in more than one location
In the penultimate week of the general election campaign the Women's Equality Party received £71,552 whereas UKIP only took £16,300
The CPS has ruled that no charges will be brought against Conservatives who were being investigated over electoral expenses
Karl McCartney tells Julia Hartley-Brewer that the commission did not treat parties fairly
There remains one file under consideration by the Crown Prosecution Service
Our host delivered a powerful opening monologue about the state of the Conservative party in the wake of an incredibly difficult week
Stephen Pound, Labour MP for Ealing North, spoke to Paul Ross about the ongoing storm surrounding the Conservative Party's election expenses
Sir Roger Gale, MP for Thanet North, spoke to Julia Hartley-Brewer about the electoral commission's fine for the Conservative Party
The Electoral Commission said the party had "numerous failures" in the declarations of its expenses
The Electoral Commission is looking into whether the party breached UK election laws after a ruling in the European Parliament
The former leader of the party will serve as a caretaker until a new leader can be elected