Do I also need a license to sit in a designer chair?
16 The acts restricted by copyright [are]:
(a)to copy the work;
(b)to issue copies of the work to the public;
(ba)to rent or lend the work to the public;
(c)to perform, show or play the work in public;
(d)to communicate the work to the public;
(e)to make an adaptation of the work or do any of the above in relation to an adaptation
Photoing a designer chair comes under copying: "copying includes ... the making of a copy in two dimensions of a three-dimensional work" (s.17(3))
IANAL.
(Remember: legislation is drafted by lawyers whose entire job is to make a document that is as painfully, excruciatingly unambiguous as English allows. Each of those rights in the short list I posted has long sections clarifying very precisely what it means. Where ambiguities or absurdities remain, there's probably been a lawsuit over them in the past 25 odd years, and a judge will have spent dozens of pages analysing each one.
In other words - criticising an act by trying to spot semantic absurdities based on a tiny extract of its summary is probably not a sensible game to play..)