yes, but don't worry you've got loads of time! i only started looking for work exp last january (as in jan of my L6 year), and so far i've got:
medisix (not work exp but shows i've researched the career etc.)
summer volunteering (1 morning a wk) at a nursing home
6month volunteering placement in a hosptial scheme (3hrs volunteering a wk + sessions on life as a doctor, etc. every month)
1 week work exp with a haematologist
3 days' work exp in a GP & dispensary.
you can also do things not directly related to medicine, such as:
teaching dance/drama/etc. to children, or just volunteering as a classroom assistant in a school (particularly disabled children's schools)
peer mentoring/.'buddy' systems at your school
writing a magazine or something for elderly people in your area
etc. etc.