The Electoral Commission informs me that it received 16 allegations of misconduct against hon. and right hon. Members in the last five years.
The Commission further informs me that it opened formal investigations into four of these allegations. One of the investigations is ongoing; one resulted in a referral to the police and is presently pending; and one resulted in a voluntary forfeiture of a donation. The other case was closed without further action being warranted.
The 12 remaining allegations were dismissed or otherwise resolved without the need for a formal investigation.
The Electoral Commission does not record expenditure in relation to individual investigations and is therefore unable to provide costs.