Will my floating laminate flooring contract in winter enough to show the edges?
You're correct that the flooring will be at its minimum dimension in winter, when temperatures are slightly lower and, more importantly, humidity is lower. Since you've essentially eliminated all overlap with your skirting, you can expect to see the edges of the floor in winter. Ideally you'd have left about half the gap you did. Most flooring I've installed calls for 1/4&quot; (about 6mm).
The usual solution is to install &quot;base shoe&quot;, a small molding designed for basically this purpose. It's often installed when flooring is laid between existing skirting. I would wait and see what movement you actually get and only take action if needed.