Railfreight Sector? Needs a bit of clarification. Bob Reid Mk1 announced the creation of Sectors on a snowy day in, I think, December 1981, although they didn't go live until the after the turn of the year. I'm slightly vague about the date - but remember the day well because I had a formal career-planning interview with the General Manager, Southern Region, that day, and because of the snow I was late! To his credit, John Palette was more concerned about the large number of passengers (as we then still called them) who had also been delayed.
When Sectors got going they were very small organisations indeed, initially acting as grit in the oyster of the Regions, already perceived as having become smug. Indeed, in many respects the Regions were little more than successors to the Big 4, even after more than 30 years of state ownership.
By the mid-80s, the Sectors began to get into their stride, vide the launch of NSE in 1986, and I think Bachmann is referring to the comparable event for Railfreight in 1987.