Do you think the plan always was to dump Julie post massacre?
He was going to buy her off, with the promise of managing a wine bar in a fashionable area of London. The tragic irony was June had the money to set her son up in such an establishment whilst she was still alive. However, Nevill was insistent that his son would only inherit his estate should he be performing the farming function at the time of his death. Jeremy hurried the clock on somewhat.
As for Julie, her conscience was pricked. One can't exactly deduce what transpired between them both post-massacre, but it became apparent to her following the weekend spent with Colin and the dinner at Blazer's Restaurant, Blackheath that there was some psychological condition afflicting him. Maybe he could never have held down a job permanently, as evidenced by his comment that perhaps he should join cousin Roly in some far-flung Buddist monastery, at home the excitement of the chase the motivator rather than the sexual act itself. In any event, the break up was inevitable at some point, one feels, and the truth would out, though from which party first will remain moot.