Gainsborough are gradually phasing out the oval shaped shower and are changing over to the new square shape.
If you want to replace your shower have a look here
http://www.showerdoc.com/showers/electric-showers/gainsborough
If you have the older oval shower and can’t see a direct replacement, then choose one of the new square shaped showers, the plumbing and electrics in the new Gainsborough showers are in the same positions as the older showers.