Looking For Work 15 Year old looking for some work experience on a farm

I'm looking for some work on a farm in the Stroud area, i can work every Saturday and can do the occasional Sunday if needed, i can also work during the holidays if needed. I have tractor driving experience and I love doing work, I'm not afraid to try different jobs and get a feeling for farming, I'm just looking around for a job on a farm to gain some work experience ! I'm in the Stroud area and can go a bit further if needed