Mart - you can download from a Sky+ box (sorry I'm a little late with this info, since rik has already mentioned it!). Although I don't have Sky, a bloke came into the shop where I work part time (in Audio/TV) and wanted a DVD recorder, because Sky+ has a 'record to external' facility, presumably via a scart. He bought one of these -
http://www.johnlewis.com/230653020/Product.aspx
Since he hasn't been back, I assume it worked OK! You can do the same with most PVR's (which is basically what Sky+ is), although if its the Humax Freesat PVR, the output would have to be via USB. For more info, have a look at something like AV or Sky forum - there must a fair number of people who have done the same thing.
Of course, if you want Ray in glorious HD forever, try the Panasonic Freesat hard drive with
recordable Bluray
http://www.johnlewis.com/230641449/Product.aspx . Record the programme in HD, then, subject to DRM, you can burn it to a Blu-Ray disc and its yours forever.
At £899, its possibly just worth waiting for the box set and buying lots of actual bushcrafting kit instead
!