I've given the floor a second coat of varnish and it's looking much better. I've decided to lay 'floorboards' in the other half of the shop which will be a little trickier as there is a staircase to work around. Meanwhile, I couldn't resist popping some of the furniture in as a dry run!
I've also started to put the brick slips on the wall. This is so time taking but I think it will be worth it. I need to decide on what will sit between the bricks and the rendering.