Monthly update – concluded investigations

Monthly update – concluded investigations

Details of the investigation concluded in the last month have been published today by the Electoral Commission. This is an important part of delivering transparency in political finance in the UK.

Name and type of regulated entity

What was investigated

Offences found

Decision taken

Plaid Cymru (registered political party)


Failure to deliver accompanying invoices with 2019 UK Parliamentary General Election spending returns

Failure to deliver accompanying invoices with 2019 UK Parliamentary General Election spending returns

No sanction imposed. Closed without further action

Late payment of campaign spending invoices after the 2019 UK Parliamentary General Election

No offence found


Closed without further action


Commenting on the concluded investigation, Louise Edwards, Director of Regulation, said:

“It is important for transparency that voters have timely and accurate information about political parties’ finances.

“Where we find offences have been committed, we do not automatically impose sanctions. We take into consideration a range of factors when reaching our final decision.”


For more information contact the Electoral Commission press office on 020 7271 0704, out of office hours 07789 920 414 or

Notes to editors

Notes to editors

1. The Electoral Commission is the independent body which oversees elections and regulates political finance in the UK. We work to promote public confidence in the democratic process and ensure its integrity by:

  • enabling the delivery of free and fair elections and referendums, focusing on the needs of electors and addressing the changing environment to ensure every vote remains secure and accessible
  • regulating political finance – taking proactive steps to increase transparency, ensure compliance and pursue breaches
  • using our expertise to make and advocate for changes to our democracy, aiming to improve fairness, transparency and efficiency

The Commission was set up in 2000 and reports to the UK, Welsh, and Scottish parliaments.

2. This release forms part of the Commission’s regular monthly investigations update, an important part of its commitment to deliver transparency in political finance in the UK. Information of this nature is published routinely on the third Tuesday of each month. Details for sanctions from previous months are available on the Commission’s website. 

3. Penalties imposed by the Commission go into the Consolidated Fund, as do forfeited donations. This is managed by HM Treasury and not the Electoral Commission.