I assume you have already done a proper Forum Search for your model number in case other people have already answered your question ?
If so and that didn't help then check out this thread: https://community.sling.com/thread/3300?tstart=0
Come back if it that doesn't help either.
Thanks for the response but I cannot find any details at all re the Sainsbury's Red stb....
but we did correspond about two years again re a Technica ECO1STBA08 from Tesco and you were kind enough to write a custom remote and it worked well until the Slingbox went wrong. I am replacing and upgrading but have found the old Technica box. Would it be possible to re-send the.bin file for the Technica?