Conservative MP Danny Kruger is under investigation over his role as co-chair of the All-Party Parliamentary Group (APPG) on Dying Well.

The inquiry follows allegations that £55,000 in donations to the APPG from Conservative Christian groups were not properly registered.

The donations were used to fund the APPG’s activities, which include promoting palliative care and campaigning against the assisted dying bill, which is set to be voted on by MPs this Friday. Kruger, a strong opponent of assisted dying remained chair of the group until earlier this year.

The Parliamentary Commissioner for Standards is investigating whether Kruger, the MP for East Wiltshire, violated rules regarding the timely declaration of donations and financial statements. Specifically, the inquiry is looking into the "registration of an interest" received by the APPG on Dying Well and the “production and publication” of the group’s income and expenditure statement.

According to The Guardian, the Dying Well APPG received £37,500 in donations from three anti-assisted dying campaign groups with links to the "evangelical Christian right."

Of the total £55,000 in donations, £22,500 was not registered until January 2024, despite APPG rules stating that donations over £1,500 should be declared within 28 days.

One donation from the group’s main funder, Care Not Killing, was reportedly registered 564 days late.

The investigation comes as Parliament debates the Terminally Ill Adults Bill, which would legalise assisted dying for terminally ill adults in England and Wales.

Kruger has been outspoken in his opposition to the bill, expressing concerns that it could put vulnerable people at risk and undermine trust between doctors and patients, as well as alter society's view of the state's role in caring for its citizens.

Premier has reached out to Kruger for comment, but a spokesperson for the MP told news outlets he would not comment publicly until the investigation is complete.