Thanks Moz! I should have mentioned the gap around the toilet base is pretty uneven - ie 1.5cm wide in parts, and much more narrow in other parts.
So other than white sealant, is there anything like a flexible trim that could be laid over the gap to disguise it, rather than something to fill...
We've laid laminate flooring in the bathroom, but not sure how to finish / seal the gap around the curved base of the toilet. The gap is quite wide in parts (1cm?)!
Any suggestions much appreciated!