phone them. thats how i got mine sorted. be very clear about what you want and why you want it (ie shadowing one of the consultants and his team, ideally for a week, as you are applying to *insert course* and need work experience)
also, an easy route is to ask about volunteering. my local hospital is always taking on volunteers (i assume itll be the same for most hospitals/?), i did it for over a year. i was able to get loads of work experience from that, i literally just asked the nurses/doctors on my ward if i could possibly shadow them. you dont get any proper training to volunteer, you just need a crb check and i got a day of talks/videos about health and safety, confidentiality, proper conduct, what we're not allowed to do etc, but its all common sense stuff.
oh and not all of the wards allow shadowing - my local a and e didnt allow it