Our current plan is to rebuild the garden under the shed (fairly urgently before the concrete cracks), level it off and make a gravelled/ pathed area with drainage down the side. We have nowhere to drain water to, as the land is bordered by neighbouring properties on all sides, so we could put in French ditches (ditches filled with gravel and covered) to drain to the bottom of the garden (as the water and washed out soil is going downhill anyway) and create a small bog garden (as opposed to an entire bog garden).
Any ideas/ advice more than welcome! And of course, volunteers when the time comes to double dig the whole garden and add topsoil. I have an excuse for now though - (a) it's dark (b) the BBC say that "Heavy soil must never be dug when it's wet as this can damage the soil structure and lead to poor aeration and drainage." Another cup of tea, then.
It would be really great to have a completed play area though. We can't even play games on the grass there yet. Come on, Kier! Come on, Bromford! Have a heart. We can't use our gardens, so we need somewhere for the children to play.