End of the world deferred

I was interested to see that the end of the world as predicted by scientists, religions and assorted cave-dwellers throughout history will not be happening thanks to a recently advertised property on Worcester Park's very own Riverhill Trailer Park Estate. The gushing prose of the estate agent promises:
"A re-furbished park/mobile home offered for sale with an eternal lease and no onward chain."

In my reading of the words "eternal lease", virtual dictionary in hand, the word eternal means "without beginning or end; lasting forever; always existing". This being true this particular property, and perhaps surrounding environs and/or host planet, have nothing to fear from any future terminal expansion of the sun or visitation from chosen deity and will drift unchanging through time forever..............

Or the estate agents could be exaggerating/fibbing. You be the judge.