Yes, I can reach the passenger switch from my driver's seat - so it's only slightly annoying. But as I paid considerably less than £10k, I will forgive many issues like that. But, had I paid £17k, then I would have wondered what I was actually getting for my extra £7k+!
Toyota Aygo has the same problem with the window switch. A clever member has solved this by mounting an xtra switch at the driver's side to controll the passenger window. You could use the same principle for VW Up. Here is the link, let's hope it works. scroll down the page.