As I recall Mr Lapthorne's "research" deliberately excluded investment trusts (why?). I suspect many of the top names in the IT world would have been on the list otherwise.
Most of these ITs have a very competitive low cost monthly savings programme that would outperform anything that an individual could do on his own.
This research finding would not fit comfortably with a recommendation to Soc Gen's client base as it would generate no commission.
Perhaps someone would care to rework this research on the top ITs that feature so regularly on this site.