Whenever I think of the 60's-70's I remember Peter in his tree-house in Putney, London.  I am Julie Adams' (nee Allan) sister and lived opposite. I also remember him in his purple cords and purple velvet cap in early 70's before he became a star in the Tomorrow's People of which, I always watched after school.  R.I.P. Peter, you will always be remembered. 

Your twin sister, Sophie, was a close friend of my sister.  They lost touch but I know Julie has been searching for her and would like to be in touch again.  Please would the family contact me via email: caron.allan1@btinternet.com