[4] J.John studied Psychology[5] at Hendon College London from 1974 – 1976, where in 1975 he was introduced to Christianity by his friend Andy Economides.

[6] Before working in Christian ministry, J.John started his career in 1976 as a psychiatric nurse at Napsbury Hospital in St Albans, England.

[8] The following year, J.John was appointed as the evangelist at St Nicholas' Church in Nottingham, England, under the leadership of David and Joyce Huggett.

In 1998, J.John received a Lambeth MA from Archbishop George Carey, in recognition of Church Growth and Evangelism.

Philo Trust has a number of associates, including Christine Caine, Joseph Boot, Paul McGee and Andrew White.

Over the years, just10 has developed into a just10 Toolkit, two separate DVD courses for Churches and for Small Groups (2010),[20] just10 for Kids, an online resource and book (2013).

Wright, Professor John Lennox, Christine Caine, Nicky Gumbel, Philip Yancey, R.T. Kendall, and many others.