VS021 - A343 or A346?

No, not the usual 'What plane will I be on' question
We're flying on VS21 on the 2nd June. I've noticed that currently they seem to be using A343's on that route, yet the seat map for our flight still shows a A346 [:?] So, I did a bit of checking on the Virgin website by 'booking' flights, and it appears that up until sometime at the end of March it is sheduled to be an A343, and after that it'll be an A346 again. Does anyone have any info on whether it is likely that the VS21 route will return to using A346's by the time we go, or is likely to be a A343 [:(] I'd really prefer a 346, purely on the basis that it looks like there is are two toilets in the PE cabin (or are they for economy pax as well?).
Any help/advice appreciated

We're flying on VS21 on the 2nd June. I've noticed that currently they seem to be using A343's on that route, yet the seat map for our flight still shows a A346 [:?] So, I did a bit of checking on the Virgin website by 'booking' flights, and it appears that up until sometime at the end of March it is sheduled to be an A343, and after that it'll be an A346 again. Does anyone have any info on whether it is likely that the VS21 route will return to using A346's by the time we go, or is likely to be a A343 [:(] I'd really prefer a 346, purely on the basis that it looks like there is are two toilets in the PE cabin (or are they for economy pax as well?).
Any help/advice appreciated