My plan is to rebuild the layout and lay the track on a transition curve. The platforms follow this gentle curve achieving more length than a conventional lozenge shape with straight sides. This is nothing new and is commonly practised by other modellers.
I drew a track plan and discovered that the transition curve also gives room for extra sidings, something else that Misterton currently lacks.
I plan to finish the rebuild within a year. Progress will be reported here under the label 'Project16'. My postings will include modelling techniques, which may be of interest to my Blog Followers.
To Part 2.