Thanks to an excellent suggestion by Andy (Hall) I now have a fairly good idea of the garden shed I'm looking to invest in - it's the Malvern Bewdley Apex 8x6 or something close to it:
And as Andy advised, I would highly recommend Berkshire Buildings at the Wyevale nursery east of Reading - they've got a fair sized area with many different products available for inspection.
My previous experience of garden sheds is limited, and I am concerned that being a wooden shed it will get damp in winter, which wouldn't be good for garden tools, bicycles and what have you. So I'm looking for suggestions about what I should and shouldn't be considering as the shed is made habitable.
My initial thoughts are to have this shed installed on top of paving slabs - we have a firm flat area of garden where the shed is going to go, so the amount of ground preparation should be minimal (we are on top of a hill so it never gets waterlogged in our garden). On top of the paving slabs would be wooden bearers which have been treated, then the shed on top of those. Just as an aside, we've got an adjacent section of garden which has had paving slabs on for a good couple of years, no sign whatsoever of movement.
BTW, the purpose of the paving slabs is primarily to keep the wooden bearers out of the wet stuff - if the bearers were laid straight onto turf then they would rot that much quicker (IMHO). I know bearers are generally considered to be sacrificial in terms of re-usability.
Once the shed is up I would then be tempted to give it a damn good dose of creosote substitute on the outside, so as to repel water. Not sure if this is appropriate or not - I'm always suspicious of pre-treated fencing and tend to take the attitude that you can't throw too much preserver at something which is going to be open to all the elements.
Have I missed anything obvious in getting the shed ready for use? Obviously if applying treatment to the inside were recommended this would be a lot easier when it is initially installed as it would be completely empty, but I'm not considering that option presently.
Andrew