Which aircraft VS043/VS044 LGW-LAS

Hi
I am trying to find out which aircraft will be operating on the outbound and return flights to Las Vegas from Gatwick. We are travelling out on 9th August and returning on 26th August and I need to know which seating plan I should be looking at.
I am hoping to book extra legroom seats and am unsure where in the plane they will be located.
Many thanks
I am trying to find out which aircraft will be operating on the outbound and return flights to Las Vegas from Gatwick. We are travelling out on 9th August and returning on 26th August and I need to know which seating plan I should be looking at.
I am hoping to book extra legroom seats and am unsure where in the plane they will be located.
Many thanks