Blu-tack the legs?
Some glue gun blobs to the bottom of the keyboard?
How about rubber feet, would imagine they would give reasonable grip.
Duck make non slip matting. Great for under mouse mats, car dashboards etc. you can get it from Wilkinsons. Same as the rubber feet.
Got these from a shop called "The Range"
You live in Portsmouth so not so far from me, the shop is literally a few roads down - I can see if they still stock them if you like? alternatively I have the same height sticky pads in "cup" shape I can post to you?
This is what they look like on a tea coaster I improvised:
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Both types cost 99p per pack.
I have a small pot of them cut into square bases (as above) so if you would like some let me know how many and where to post![]()