How small do you need it? Google Decina Bella Bath for an example of what is available locally.

it's time for this bath to be retired back to the paddock...post a plan of the bathroom including measurements, size and location of doors and windows to invite suggestions for an upgrade

Hi, unless you take a bath at least once a week I'd skip the tub. I'd rather enjoy a bigger walk in shower, which is also a lot safer than climbing into a tub to shower. If you have the space instead of a tub and shower I'd consider a double vanity to give you extra storage space. It's a little luxury you will come to enjoy when everyone is getting ready on the morning.

Kate's idea of using the pantry space is an excellent suggestion as a toilet can comfortable fit within 800 x 800 alcove with the end opening towards the bathroom and closing the extra door from the laundry toilet could allow enough space to squeeze in an extra handbasin but please double check all the dimensions ..measured from wall to wall the bathroom has to be more than 1200 x 2, the laundry more than 1200 x 2 and the toilet size isn't right or there wouldn't be enough space to open any of the doors??