I have been asked to become a trustee of an English unincorporated charity. However, a search of the Charity Commission database shows that the last submitted return was in 2005 with an income of £17k. The average income is between £15-20k, so definitely needs to be submitted. Accounts are available at least for the last 10 years, possibly longer.

 I think it is down to a combination of ignorance and trustees who knew what to do fading away rather than deliberate.

The Charity Commission only has the address of a former Trustee who is no longer associated with the Charity. There does not appear to have been any approach to the charity or action by the Commission during that time. The AR is listed as outstanding for all years up to 2017 when it stops.

What should be the action/s to bring the charity in line and what could be the likely formal consequences?

My first inclination is to work with them to bring the situation up to date and then ensure they keep on top of the administration, but I do not want to inadvertently expose them to penalties.