Holy Trinity Brompton is an evangelical powerhouse in Great Brittan. What is more, through their well known Alpha Course, HTB is a world-wide presence. There is much to admire and appreciate about HTB and the Alpha Course. But, in my mind, the things to be concerned about are significant.
In a helpful article, Alastair Roberts offers keen insight into the nature of the big tent, low church evangelicalism being spread by HTB.
Having served a non-denominational church in the northeast I can tell you that Mr. Roberts' analysis is spot on.