There certainly can be legitimate functional reasons/purpose for basins to be required set appropriately in relation to the wall to suit the selected wall spout setup, and having experience with similar details the spout length chosen can determine the basin position and does need to be a certain length to work properly. Sometimes this requires adjustment of basin size and bench depth. In this case something's clearly happened.....without understanding the company's particular processes my guess is that the bench depth larger than what it should be. It's your home/investment, you have to live with it long term. IMO what differentiates (great from ordinary) builders is their capacity to resolve issues and shoulder responsibility when something like this occurs. Believe me they (should) have enough fat built in the profit margins to resolve these types of issues. The good news is you actually have a physical example you can refer to in the company's display home. If required go and measure it and compare it to yours to be 100% sure - in custom/boutique situations clients don't have that luxury/back-up check. Try not to play or get drawn into a "blame" game, or accept lame excuses (which the industry is expert in ;) ), it doesn't matter exactly how it went wrong, the main thing is you want to get it right/resolved. Stick to your guns ;)

good points SK and Eco thank you. Looks like I'll be going with the flick tap, offset at 2pm to the right of the round vessel basin, mounted in the centre of the top of the vanity (not semi-recessed). Any thoughts on whether the vessel basin should be bang in the middle, or offset to the left slightly to balance the tap being on the right?

Save big money on importing one from the UK and spend it on design to make the space work for you without the need for such an impractical solution. There are some cute, tiny wall mounted hand basins which would be a neater solution. https://www.reece.com.au/product/basins-c448/wall-mounted-basins-c452/axa-cento-mini-wall-basin-right-hand-with-fixing-1-9505814 If there is no other option here is another type of toilet/handwash product, but I don't think it looks any better than the Caromo design, although overcomes some of the impracticalities mentioned in the previous comments. https://www.reece.com.au/product/basins-c448/wall-mounted-basins-c452/roca-w-w-integrated-washbasin-white-5-star-9505427 Best of luck, Dr Retro of Dr Retro House Calls/Dr Retro Virtual Visits

Hi all, It's very difficult to find where I can get a decent quality glass bowl. The majority of the bowls which I suspect are chinese imports are tainted glass, where I am looking for a pure quality similar to the work that Euroglass undetakes. Does anybody know where I can buy one from?