Thanks for all of the great suggestions.
House is a 1960s bungalow so comes from a time when design / layout must not have been a priority
On the upside this does mean that the entire attic area replicates the floorplan with the exception that I would need to come in a meter or so on each side of the attic to allow for head clearance.
I have updated the link to what is currently in place. The Lounge and Study are currently Bedroom 3 and Kids Playroom (with access to walled back garden).
I also added another link to show front and rear elevations.
Initial idea was to remove the supporting wall that is currently to the left of the kitchen. This would create a more open living space and a brighter kitchen area. Was also considering closing up the doorway at this point as there would be no need for it any longer.
Half turn stairs may work well here ...... but the idea of putting the stairs in the bedroom behind the kitchen also sounds good as it also brings the stairs into the centre of the attic area without inhibiting too much on the living space.
Really trying to keep disruption and cost to a minumum, whilst creating a better layout inside so we are reluctant to take down too many walls / move the kitchen / convert garage.
Hopefully the amended and additional links will be of help.
Appreciate the suggestions.