A double basin can look balanced on a drawing while still making two people reach across the same stretch of counter. In Ellon, a single 1200 mm wall-hung vanity brings two basins and drawers together, with a broad mirrored cabinet above and dedicated toothbrush charging. This creates one continuous washing wall with two places to stand.
The design question is how that single stretch is divided when both basins are being used. Measure from the centres of the bowls and taps, then mark where hands, elbows and the items shared between them will go. A useful middle area should stay reachable without becoming the only place to set things down. Looking at the mirror, bowl spacing and charging together helps keep the two positions usable within the same width. It also gives you a better basis for deciding whether a wider single basin or two separate bowls suit your routine.
