The Future Kings of England is the trio of Ian Fitch (guitar, keyboards, effects), Karl Mallett (bass, keyboards, effects) and Simon Green (drums, keyboards, effects) from the UK.
They play old-style/sounding psychedelic rock and have released 3 albums, all highly recommended.
The Future Kings Of England
The Fate Of Old Mother Orvis
The Viewing Point
Here's a song called Mustard Men from their second album.