Many thanks for your comments....
Firstly, the silo is actually quite light inside... what you can't see in my photo is the Crittal French doors which are South facing, as are the two hatches in the roof...
I am retired. I sold my home and decided to do something I have dreamed of all my life, and that was to acquire a piece of land to turn into a wildlife reserve... that the property had a small building on it was a bonus. I really wanted to use it as an art studio, but the old pumping station faces East and only has small windows on that side. Not only that, at 19' x 11', once I have put in a WC, etc., it really doesn't have the necessary space to create large canvasses & sculpture.
The silo just happened along... it was cheap and it effectively doubles the available space whilst keeping to the same footprint.
I can use the land entirely for my own enjoyment or alternatively, it would make a great holiday let, if the council were to allow..
I think it would make a great place for visiting artists to stay... the area is full of wildlife and is close to a river and marshes...
I guess I would need to apply for a change of use, though, as it is currently B1 Office use. It seems that the planners are happy for the pump house to be used as an office...and they have also said it can have two parking spaces and that the WC would need to be big enough to allow for disabled access... Though I'm not sure how this could be achieved without extending the building... and there lies the problem, because there is no Permitted Development in place.
The previous owner wanted to use it as an equine rehabilitation centre, but at just under an acre, I can see why this idea was refused... it involved further multiple buildings and a horse exerciser whilst retaining the pumping station as an office. It would have been too much...
I honestly can't see that replacing the pump house with the silo, which is much more in keeping with the agricultural nature of the land would be opposed... but who knows?
I suppose I need to make a decision on whether to go for business use, holiday lets or a change of use to sui generis when I make the application. I didn't go into this with an actual plan... as you can probably guess!! But now I need to decide which direction to go in....
Meanwhile, I have enjoyed being on the land and have been planting out a native hedgerow and wildflowers... I am lucky enough to have a deep well containing the most amazingly clear (drinkable) water and have installed a submersible pump which enabled me to re-instate a silted up watercourse earlier this year. This has attracted all sorts of wildlife, including water voles, which are endangered, and also hares...
I really appreciate all the help you have given... many thanks!
Looking forward to living the dream...
Regards, Theda.