A man has been questioned by council officers investigating a 'potential criminal offence' at the house where street artist Banksy painted his 'Spy Booth' mural close to GCHQ in Cheltenham, Glos.
Officials entered the house with a warrant and said they found that 'substantial work' had been carried out inside the listed building.
Roger Wilson, the business partner of the property's owner David Possee, was formally interviewed about the work that has taken place, possibly in breach of planning and listed building regulations,
The 'Spy Booth' artwork appeared in April, leading to a financial battle over whether it stays or goes - and also becoming a target of vandalism and an apparent attempted theft by a man who drilled four holes in the wall around it earlier this week.
More top news
Becky Watts's family talk exclusively to ITV about their loss.
Becky Watts' uncle speaks exclusively to ITV News following the arrest of two people on suspicion of her alleged kidnap and murder.
The killer serving life for the murder of Jo Yeates has been sentenced to a further 10 months after admitting possessing child abuse images.