original: For that year the Festival was moved to other local venues but by the following year the hall had been rebuilt and once again it was opened by the Queen, this time at the start of the 1970 festival.
simplifications: For that year the Festival was moved to other local venues.  By the following year the hall had been rebuilt and it was opened by the Queen at the start of the 1970 festival. The Festival was moved to other venues in that year but by the next year the hall had been rebuilt. It was again opened by the Queen, this time at the start of the 1970 festival. They moved the festival that year. The venue had been finished the following year. The Queen started the 1970 celebration. For that year, the Festival was moved to other local venues. By the next year, the hall had been rebuilt. Once again, it was opened by the Queen, this time at the start of the 1970 festiva For that year the Festival was moved to other local venues. By the following year the hall had been rebuilt and it was opened by the Queen at the start of the 1970 festival. That year, the Festival was moved to other venues. The next year, it returned to the rebuilt hall, where it was opened by the Queen. In 1969 the Festival was moved to other local venues. By 1970 the hall had been rebuilt and was opened by the Queen at the start of the festival. That year the Festival was put at local places but it was rebuilt and was opened again by the Queen, at the start of the 1970 festival. The festival was moved to other local venues that year. The hall was rebuilt the following year and was opened again by the queen at the start of the 1970 festival. The festival was moved to other local venues for that year, but the hall was rebuilt the following year and the Queen opened it again, this time at the beginning of the 1970s festival.