Would this be it H,? Taken from an old programme listing.

Tuesday 6th June 1951. (old git.!!)
15.15
: R.A.C. FIRST INTERNATIONAL RALLY
of Great Britain
A commentary by Raymond Baxter on the speed hill climb from the famous ' Rest-and-be-Thankful' hill in the Highlands of Scotland (Map on page 7)
Contributors
Commentary By: Raymond Baxter