From the moment you enter the lobby of Bristol’s City Museum and Art Gallery, you know that Banksy has arrived.

The entrance hall has been taken over by the “portaloo” toilets, stacked like Stonehenge, which became iconic symbols of the Glastonbury festival a couple of years ago.

But as you enter further into the building you realise that the exhibition, entitled Banksy Versus Bristol Museum, has taken over the entire building.

With 100 works - 78 of which have never before been seen in the UK - this is Banksy’s biggest ever British exhibition.

The anonymous Bristol-born artist’s new works blend cleverly into the existing collection - a Guantanamo escapee can be seen clinging on to the biplane that has flown over the main hall of the museum for years.

Upstairs the galleries have become an interesting game - spot the Banksy, as he has hidden away new works amongst the old.

Often they appear to fit in well with the room - among the religious iconography, for example, he has placed an oil of the Madonna and Child, which may seem conventional at first glance, until you notice that the Holy Mother is listening to her iPod.

The theme for blending the traditional with the Banksy begins in the main hall, where classical statues line the walls - familiar images that have been subverted by the artist.

Michelangelo’s David is now wearing a suicide bomber’s jacket, and the Venus di Milo now appears as an amputee beggar.

Rebecca Burton, deputy head of collections and archives for the museum, said: “The way he has blended his work into our collection is incredibly exciting.”

The show runs at Bristol’s City Museum and Art Gallery until August 31, 10am to 5pm daily. Admission is free.