Curiosity drove me to look at a few books that give details of handicap weights over the years. I had a couple of gaps that I asked the RP to fill in. There’s a difference of opinion concerning the first entry. My information shows a minimum bottom weight of 4st was implemented in 1850 whereas the RP records no minimum weight was applicable until 1860 at 5st 7lb. I’m bowing to the RP on this.
1860 5st 7lb
1889 6st 0lb
1931 6st 7lb
1961 7st 0lb
1983 7st 7lb
1995 7st 10lb
2002 7st 12lb
2013 8st 0lb
2022 8st 2lb
Hope this helps someone.