The Real Chart has always been affected by the other chart, the Wilson track being nothing knew. The whole idea of getting a record in the chart for Record Companies in the past and even today if they are honest about it, is a boost to the sales of any record. With a multitude of product on the market if you can get a record into a high profile chart such as the one the BBC use, you can pick up sales, just from people visiting the website to see what is number one or look at where their fav act is. I believe that even the OCC chart has links to purchase tracks, does anyone believe these are never used in large numbers?
The OCC take measures to ensure that a record is selling and isn't being fiddled into the countdown by a Record Company. They do that because a chart record will generate extra sales, then one not in a chart.
I have said many times that the charts of the OCC past and present have never really reflected on the fact a record is in it's chart, because they tend to sample odd effects like this out. Sort of pretending the chart is not present when shops sell records
However I even have witnessed the effect of the OCC chart top 40 on some I-Tunes records, those that are performing better on I-Tunes than the OCC chart -rare true, but it does happen. Have seen a record make the 40 at 40 of OCC, yet lagging behind on Real, that is slowly going up yet selling well on I-Tunes say at 29, and come Monday top ten I-Tunes, all because it enters at 40! By the way there's no other reason, it wasn't on TV etc!
In the past OCC records that were not actually selling at all were the only ones excluded from the Real Chart, examples of which can be seen on the Classic Chart page on my blog from 1985.
Correction 76 down to 92.