In store at Debenhams in Harrow, probably other branches given its online as well. However in store they had blue and red colours included and possibly others - online looks to be black only.
3 x £15 coffee credits with nespresso club effectively makes it free. The genuine capsules are the best by far.
Order capsules from nespresso online or go to a store, but try the included ones first to decide what you like.
I get a machine every year with this deal and sell the machine as I'm happy with mine. All machines produce the same quality coffee, and come with a three year guarantee with nespresso direct. They'll even loan you a machine if you're unlucky enough to have yours develop a fault.