Waddington's Game Machine

[Technosis]

I've had this for a while now. It has a basic calculator style green LED display. It plays some very basic games, and also functions as a standard calculator. When new it included some overlays for games like racing, etc. (I don't have the o/l's). Does anyone remember this being sold in stores or have it as part of their collection? Thanks.

Here's a pic next to an Atari cart for size comparison.

http://i63.photobucket.com/albums/h128/technosis77/Waddigntons_Game_Machine_big.jpg