Hello コサチン, Im from the UK, and used to work in Oxford House College, and I think you want some help to choose which college would suit you, I have some advice for you I think Malvern House is a good college but I do not know how they teach there, I have been working in Oxford House College over 10 years and the teachers I know there are very good, and also it's not up to the teaching method it's up to the individual and learning capability that means you, if you can learn English and studies very hard you can learn English in 6 months. There are many colleges in London and some are very expensive and some are very cheap. Also Oxford House College has all the accreditation by the councils as it has passed through quality and teaching. This is all I can advise you, I hope to meet you if you come to study in London, my name is Burak. We can keep contact here. Take care, all the best with your studies.