After looking on ebay for some time I came across a drop down desk that I liked:

While a furniture outlet has a slightly damaged one available, they are asking a lot more than I would like to pay, so I am contemplating dusting off my year 10 woodworking skills and building one myself as well as some drawers for storage I'll put on castors.
My thoughts are to start by making a box for the top and then adding the legs as a frame, though I'd appreciate any advice from members with experience in furniture/cabinetmaking if you think there is a better way to go about it.