A centred fire place and shelves either side sounds really nice, and if you have a more traditional style I think that would look great. If you have a more modern style, how about having the fire place off centre for a bit of interest? Then shelves above and on the other side. Something like this, perhaps

rome_agile, have you decided whether to put small round table & chairs under stairs, or bar stools at bench? I'm thinking you might be more comfortable for extended dinners sitting at a table and chairs, plus you can always tuck up an extra stool or two if you are entertaining. There isn't much room at bench and people wouldn't really be facing each other. Stools are fine for quick and casual, if you have space. Maybe backless ones that tuck under the overhang a bit. Have you seen a Tulip table and the clear Louis Ghost Chairs? The Ghost chairs would allow light through so you don't lose the view outdoors and that space wouldnt fee crowded.

HI, any chance you could put more photos ?

Thank you everyone for great suggestion !! I have a another follow up question in terms of furniture arrangements Any recommendations around what is the best type of sofa (L shaped or 3 + 2 seater or 3 seater + arm chair) with TV unit and placement of furniture's in the living room..