This photograph is of a Miniature Circuit Breaker or Cutout Relay - 4 contact type. The text on the back of this photograph reads:
Used in two places 1) As a guard on each group of T.I.M.s 2) As a cutout in the event of failure of drive etc on an adding unit.
This type of cutout relay can easily be seen in use in the previous photograph in the Photo Gallery. Click on the image to go to the Photo Gallery index page. I find it interesting that the company name Totalisators Ltd is printed on the paper along with the amperage identification, inside the glass casing of the fuses, visible on the lower right hand side of this photograph. Two of the fuses are oriented in the fuse holder in a fashion that makes the name clearly readable. Totalisators Ltd. was the UK associate of Automatic Totalisators Ltd. In the fuses of my time, the digital minicomputer based totalisator era, the current rating of fuses was stamped in one end cap of the glass case.
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There is no photographer's stamp on this photograph.