The Edinburgh Competition Festival Association runs an annual festival that provides an opportunity for amateur musicians of all ages to perform their pieces in a friendly workshop environment and, along with other performers of a similar ability, receive constructive feedback and advice from a specialist adjudicator.
Newcomers are very welcome and they are keen to have more participants from state schools. If this is an opportunity you would like to pursue you can download their 2017 Syllabus, or contact them through their website or Facebook page.