Major fraud investigation under way into £112m hotel built by Unite union

SFO inquiry follows two reports ordered by union’s boss, Sharon Graham, into conference complex valued at £29m

The Serious Fraud Office is investigating the construction of a hotel and conference centre owned by one of the UK’s biggest trade unions, the Guardian understands.

Unite the union spent £112m of its members’ money under its previous leadership on the project in Birmingham, which has since been valued at just £29m.