I'm an old building purist, but so long as you don't do anything irreversible to the Victorian fabric of the house, I think it's great to make use of all the space. I wouldn't have done concrete, but I hope it doesn't cause you problems now it's been done.
Floor-wise, arguably it's more practical to have something soft for this sort of workshop. Not only will you drop things on it, but you wouldn't want, for example, to damage a frame if you dropped that on something unforgiving. If you've sorted out the drainage, what about cork? It's really cheap, so can be replaced when shabby. Also, you can get it in white, which satisfies the 'simple' criterion.
I'm an old building purist, but so long as you don't do anything irreversible to the Victorian fabric of the house, I think it's great to make use of all the space. I wouldn't have done concrete, but I hope it doesn't cause you problems now it's been done.
Floor-wise, arguably it's more practical to have something soft for this sort of workshop. Not only will you drop things on it, but you wouldn't want, for example, to damage a frame if you dropped that on something unforgiving. If you've sorted out the drainage, what about cork? It's really cheap, so can be replaced when shabby. Also, you can get it in white, which satisfies the 'simple' criterion.