Just had an enjoyable few days in Dumfries. An excellent B&B, with bath and shower, but.....
The house was an 'arts and crafts' inspired place. Our bathroom had been constructed as a 'box' inside a well-established lean-to conservatory. Although the conservatory wasn't readily visible from the areas open to guests, we could make out the shape of the 'box' inside. I have a suspicion planning would probably not have been granted for a 'proper' fully weatherproof extension, given the nature of the building as a whole.
Is building an extension inside an existing conservatory a loophole?