Group Discussion

The slide mount says "BMS Summer School Study Group July-Aug 73" but that's not really much of a help.

There are some hints on adjacent slides that the location might be Beresford House School, Eastbourne, but the BMS is not explained.  
British Medical Sorcerors?  Bowel Movement Satanists?  Bournemouth Methodist Society?    We may never know.

Bonus - The Last Victorian Leviathan Steam Ship