Got round to fitting them.  It’s quite a drawn out affair and I took quite a few photos so might do a tutorial for the how to section at some stage.   You’ll also note that I fitted sill guards.  The lowly steerage level Yaris has them but the 30k Cross is devoid of them.  They were about £77.  Front and rear mudflaps were only £15 a pair so worthwhile in my opinion.