This is an interesting issue.

On my profile it states that I joined in 1992.

That said, in the days when LHR had only three terminals and BAC-111s and Tridents were the only planes flying around Europe, the Executive Club was an "invitation only" thing which I was invited to join some time before 1980. You had to go up a tiny escalator behind the Duty Free in T1 to get to the windowless lounge....

After about 1981 (which is when I emigrated to The Fatherland) it turned into sort of subscription thing and I seem to remember you had to pay GBP 50 per year for this.

It seems there are no electronic record of the early days and therefore the earliest starting point is 1992 for everyone.

I wonder if the missing TPs would have any impact on my life TPs and how would I be able to establish this?