Soeone mentioned UKP2000, which oresumably would be kit for UKP1000. I do not see UKP1000 kit as needed, definitely not kit uopgrade for that. A sleeping bag (or double two "3 season" ones), a bivy (3 m of poplin from the fabric store, at most one hour with Mrs Husquarna or Miss Singer), an anorak or somesuch (what is the surplus rate for the Swedish army one?), boots (ok, one migth have to pay UKP120 for those). The only thing there that is special is the boots, but even they would make "you" the envy the next time the UK gets a bit of snow, while waiting to see if the buss might come. The rest is kit that might come in handy whern doing winter camping in the UK (ok, the M90 parka might be overkill, but will work).
As to boots, I just bought a pair of
http://www.skramtraskskon.com/?page_id=4&shopp_pid=17 Wool felt with a rubber bottom. They extremely ligth, i particular when compared to my Nokian wellies (
http://nokianjalkineet.fi/en/boots-outdoor/tuura-en/ but
http://nokianjalkineet.fi/en/boots-outdoor/kaira-en/ is better for expedition wear).
But for some reason winter courses are hard to fill. I know that some years the Swedish Surival Guild one had not made numbers either (hmm, SEK 4500, near Åre this year).