Some that have been mentioned already Courtney Victoria, The photographic eye aka Alex Kilbee and Nick Carver.
Some that haven't been mentioned:
Shoot Film Like a Boss, Steve O'Nions, Andrew Banner, North Light Photographic Workshops and Nico's Photography Show, Gavin Lyons
I go between Millers and WHCC
Some that have been mentioned already Courtney Victoria, The photographic eye aka Alex Kilbee and Nick Carver.
Some that haven't been mentioned:
Shoot Film Like a Boss, Steve O'Nions, Andrew Banner, North Light Photographic Workshops and Nico's Photography Show, Gavin Lyons