When the Falkands Op was brewing up I was with the group EU. I remember this question was asked in all seriousness as were several other 'interesting' ones.
Anyone who had ever read an account of Shackleton's epic to South Georgia would have known the answer. I think the cunning plan was to drop a grader from the Herc on a Heavy Stressed Platform to make a tac strip.
The fact that the HSP had effectively been out of service for some time seems to have escaped them. Quite what the Herc crew were supposed to do after the drop was not enunciated.