Confidence: I'm as sure as I can be.
Notes: I can see it's a spider and it looks similar to the crab-spiders I'm used to seeing, but is clearly not one of them. Presumably related though? Small-bodied with long striped legs held out ready to grab an unwary fly or bee visiting the poached-egg plant. Tracery of dark marks on the white abdomen. Leg-span maybe 20mm, abdomen no more than 5mm across.