Staircases come in many varied sizes and shapes, with 'fans' of steps at the top or bottom, sub-landings, etc. It's often possible to fit a transfer platform, construct 'infill boxes' or use two straight stairlifts. Any one of these options is much cheaper and more readily available than a curved stairlift. And you will save yourself £££'s!
ACORN can supply curved rail stairlifts, but these are only really needed when the entire staircase is curved.
Why not contact us and we can go through all the options that are available to you?