A brief analysis of the research that I have found would be:
1. There were only two big name brands that were trying to appeal to the teenage market.
2. Teenagers were mainly using 'adult' make up brands instead of those trying to appeal to them.
3. 17 seems to have been neglected within the Boots brand and needs a re focus and re fresh of ideas to appeal and interest the teenage market again.
4. 17 has many sub brands within it and this some how needs to be all tied together with a stronger brand identity.