[JMT1985]

This article from Transdiffusion shows that there was an early lunchtime bulletin from ITN in 1964:
transdiffusion.org 

Which is what I said yes - I think offering a lunchtime news summary on a Saturday was a nice way to lead into the sport. Also the 4 minutes of news wasn't going to eat too much into the regulated amount of hours they could use.

Still amazes me how restrictive television hours was until 1972, and all government mandated - other countries at the time had limited television hours simply due to budget, the fact was British television, especially ITV had a lot more programming they could air, but not enough broadcasting hours to air it until 1972.