Young models with experience needed

I am searching for young models aged 13-17 with experience walking in runways. Models should have previously taken part in fashion shows. Would be willing to hear from people with experience in catalogue modelling but please specify your experience in your application. Models should be slim and healthy. Models will be needed for the last weekend in August in London. All models will need to attend a casting if they suit my needs. At the casting, you will be required to walk a runway. Training will be provided for the 26th and 27th August, so please only apply if you are available to attend one of these days. For the two days, all models will receive £300.