The detailed info on the 50's and 60's is absolutely incredible Trevs - is some of this from memory? (I know what you've said on the 70's is spot on!!) V interesting to me that Mrs Robinson ep would have had one more week in the 20 had the chart basis not changed when it did. For about 6 months, the BMRB top 40 had at laest one tie position in it, they should have applied tie-breaking by looking at sales movement (as was done before and after). When was the chart of the year first done properly using sales (albeit with a 3 week early cut-off - was it 1970?) The points systems ones I've seen for the 60's are dreadful - because Can't By Me Love, 1964's top seller, sold like hotcakes over a very short period of time, it didn't even make the Top 20! (I'm a Tom Browne fan - see my site at listen.to/uktopforty)