So, we're not huge fans of skirting boards, but this is only a rental after all, so wall and floor are not as pristine as they would need to be, to have them meet flush.
Well, here's what we did, bought 3x2s (cm), sanded them down, painted them white, sanded them again, painted them again, and voila!, ready to use!
Makes a change to use skirting that's the same colour as the wall, not the floor.
Back to wallpapering. (Yes, we're still at that ;)