Election Expenses - questions by Conservative party workers

Conservative Party workers involved in the controversial Clacton by-election have tonight demanded a full investigation into tens of thousands of pounds in undeclared spending - which they say may have breached the law.

Channel 4 News has obtained new evidence that hotel rooms booked and paid for by the party during the by-election were seemingly not declared.

Even the Party's own election agent, who signed the declaration, had a room at one of the hotels. The extra spending would have put the party far over the £100,000 limit allowed by law.

Political Correspondent Michael Crick has this exclusive report.

Read all about Election Expenses reports here: http://www.electionexpenses.co.uk/