The school we have partnered with are a very high end provider and is a selected school. They have teachers who have Masters and Phd level qualifications and are well established. A requirement would be for your child to produce a personal statement, this would be assessed before offering a place.
When you enrol through Course Detective you have the benefit of being wavered a £299 application fee so can apply free of charge. Each IGCSE is £2000, however, up to 10 can be taken for £9000, bringing the costs down. Completing more can open up opportunities for A Levels, both with them or any other provider, however- you can still opt to do fewer if required.