I remember one occasion in the very early 60's when word got out on the grapevine that N H Knorr was giving a pre assembly talk at Twickenham on a mid week evening . Very quickly we bookeda coach ,filled it full and set off the c.60mile journey .
The stand was full , they had to open up the rest of the stadium and we listened enthralled as he spoke for at least two hours.
Would it happen now? I dont know . In Britain there is always a novelty value in hearing the President or a G.B . speaker wheras the Americans here them much more often.
I know lots who would travel to hear a speaker from the U S.