Ordinary 35mm colour print film (e.g. from Tesco or Jessops) will be fine for a basic test.

Use something like Fuji Sensia or Provia 100F 35mm colour slide film if you want to check the exposure accuracy. (Sensia is cheaper - I think there's both 100 and 200ISO available.) The slide film will need E6 processing - Peak Imaging at Sheffield are reliable for E6. There are other labs around, and back pages of photo mags should have adverts etc.