This link takes you to the The Employee Purchase Programme from Apple, you click accept and it shows the pasge with the discount prices. Not huge savings (e.g Ipod touch savings between £12-20, Ipad between £9-20, £8-10 saving in Ipod nano, ...etc) depending on the model.
As I mentioned not big savings but might help if you want to buy only from Apple store. Free delivery.
Don't know whether you can get savings on Macbooks, No saving on Iphone!!!!