Used the yellow frame feeder from Modern Beekeeping. Found I was missing one of the floats at the last minute, by the hive (!) Had to use some tactical bits of stick on one side 
2 x 1 kg bags plus nearly a litre of warm water gave me 2 litres of gloop which filled the frame feeder to withina few inches of the top.
The bees were quiet and clustered (about 12 C at the moment) so no smoke was needed.
Hopefully, they'll stash the syrup away and process it in the next few days to give them something to fall back on if the weather turns bad (again).
FG
2 x 1 kg bags plus nearly a litre of warm water gave me 2 litres of gloop which filled the frame feeder to withina few inches of the top.
The bees were quiet and clustered (about 12 C at the moment) so no smoke was needed.
Hopefully, they'll stash the syrup away and process it in the next few days to give them something to fall back on if the weather turns bad (again).
FG