Sadly it probably will be withdrawn but they could keep it around until worldwide production ceases.
If you get a chance to visit the Toyota factory in Derby it is well worth the trip. The vehicles aren't made in batches, on a single production line you could have one vehicle as a RHD hatchback for the UK, then very next vehicle following a LHD estate for Germany etc. Each vehicle is a different external colour and internal trim specification.
There won't be a dedicated line for UK RHD vehicles, even if there was something set up for RHD the Japanese and Australian market vehicles are still being made.