Does anyone know who owns/operates G-BVLJ…I noticed it is in the livery of Air Botswana (without the titles!), who used to operate BAe 146s in the past, am just curious to know what happened to it after it left them?

As it is owned by Inflite, presumably they were the lessees when it was operated by Air Bot. An export licence has been granted for it dated 26/4, so its UK days would seem to be finite.