The wiki article for this game is here.
http://en.wikipedia.org/wiki/Gribbly%27s_Day_Out
I can find speculation it was released on the amiga here
http://eager.orgfree.com/PROG/B/BRAYBROOK.html
Acorn here
http://www.acorn-gaming.org.uk/index...=Database/DB14
C64 twice here
http://www.c64gg.com/complete.html
Info on the design team Graftgold here
http://en.wikipedia.org/wiki/Graftgold
It's not on the C64 database, and although I never played this version back in the day, i did play a version released on the Acorn Archemedes A3000 (it had had a graphics overhaul, but the gameplay and level design seems almost identical). I'd be very grateful if someone could help me chart it's release/console history.