If you lined up the 300 or so acts who travelled to Brighton for the Great Escape against a wall it could be difficult to tell many of them apart.

Scanning down the line, the default I’m-in-a-band look of skinny jeans, customised T-shirt and spiky hairdo would soon begin to blend into one.

This certainly cannot be said for the School Of Seven Bells, or SVIIB for short.

The Brooklyn three-piece is made up of Benjamin Curtis, formally of Secret Machines, together with identical twins Alejandra and Claudia Deheza.

Using only guitars, synth and drum machine, the trio create dreamy soundscapes in which the twins’ marvellously lulling voices twist and bend over each other like angels in a lovers’ embrace.

With their long raven hair tumbling over their faces, Alejandra and Claudia stood either side of Curtis as if they were Native American oracles trading in floating, breathless tunes instead of fortunes.

Current hit single iamundernodisguise, with its repetitive refrain resembling Julie Andrews experimenting with Gregorian chanting, was an early highlight of a top quality, if only half an hour long, set.

The only complaint was that, like a fleeting kiss, it was over before you could really appreciate it.