Braekafast bars typically project out into space, usually starting
from some cabinets so I'm not even sure if what I plan is called a
breakfast bar. Anyway I'm talking about the long edge of the work top
butting to the wall and the outer edge supported by legs, so when you
sit at it you are facing the wall. Only thing is that the radiator is
on that wall and it is the only spare wall in the kitchen. Do you
think this will have a significant effect on the circulation of the
warm air from the radiator & do you think it would be uncomfortable on
the legs (i.e. too warm) under the bar when in use?

The other problem is it would need to be granite to match the rest of
the kitchen & I'm not so sure about supporting/fixing it on the
partition wall & legs. Any input much appreciated.