It is technically possible, but, assuming you don’t want to retake y12, it can be a logistical nightmare. Finding another sixth form that does the same exam boards/ modules you studied in year one can be a real issue and differences in teaching can mean even if you match up perfectly, you may end up missing certain modules and overlapping others. Generally it’s best to either stick it out or commit to re taking the year, but I recommend reaching out to potential sixth forms about your situation just in case. It’s really dependant on how flexible you’re willing to be and how willing they are to accept you.