Small Charity Fundraising

Hi I volunteer for a Hospital Radio Service, we are only small with a turnover less that £5k a year, volunteer run. Luckily get support from the hospital with s studio and facilities but that’s where it ends. I'm looking for fundraising ideas, we don’t need much just enough to pay for software,insurance,licences etc. and a bit of equipment. What should we be doing what should I explore, were not looking for 1000s just a few hundred is good.