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While never clearly seen on screen, there were some prop British Pounds made for the episode "Prince of Wails". The money was used in the various robbery scenes and was meant to be seen flying about as "Robin Quinn" and his Oakland Raiders carried out their crime wave.
The man you see pictured is Don Buchanan, the Vancouver prop master for season one and two of Sliders. Don's face would appear again in the episode "The Young and the Relentless." You could see both his face and name on a magazine cover that announced Don was running for President on that world.
Of course, the prop maker's sense of humor did not end with Don's image...as should be obvious with the printing on the back of the bill.