Yep the Ashes test match is the one to watch out for with the women in white pants. The challenge with cricket is their pants are baggy and normally have their shirts tucked in which makes spotting thongs much harder than most sports.
Also the one match has up to 30 hours of footage over five days.... So a lot of waiting.
Probably the best opportunity is later in the day after they've been out in the sun for hours, pants cling more also greater chance of the rare slip.
Only other one I spotted was Darcie Brown with the feint impression of a green thong underneath.
I'm pretty sure that Kim Garth and Phoebe Litchfield wear them (never seen granny VPLs on them ever) but never spotted an actual VTL or a slip...... Yet!
Thong wearers Lauren Cheattle and Sophie Molenaux aren't in the side. Neither is Georgia Wareham who occasionally does.