Farrow and ball all white (No.2005) modern emulsion (5L).  
Cash on collection or cash on delivery within London for a small fee.
Other colours available in 5L tins, brand new:

All white, estate emulsion (No.2005)
Pointing modern, emulsion (No.2003)
Tallow modern, emulsion (No.203)
Wimborne, modern emulsion (No.239)