Can confirm this - if I'm doing this journey I stop twice, as frankly 1)I'll be needing a cigarette and 2)my bladder can't take it, and it's not taken me longer than 4 hours. 3.5 is pretty much on the money as there are average speed camera sections and 2 lanes instead of 3 in others, which can get rammed with traffic. There's not even motorway until you reach the Hampshire border!According to google maps Bournemouth to Cardiff is 3 hours so max 3.5 hours each way with normal traffic
ETA is she genuinely claiming that this trip will take 6 hours??? The DRAMA of it