GlasgowMan
TF
Use a white adhesive. Use a montolit cutter with a mosaic mat to snap them. If you need to cut with a grinder use a variable speed one with a blade suitable for glass. Montolit do one. As its a small area the metal ones can be cut seperately if necessary . Also instead of using tile trim why not use the rectangles to create a frame and cut into that? looks much nicer. I did the same with these Fired Earth mosaics.
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Thanks very much for your help, what colour of grout do you think would look best on the mosaics I’ve picked?