Which announcement was inspired by Elvis’s refusal to do encores? The Saturday quiz

The questions

1 Which monarch was Queen Victoria’s eldest grandchild?
2 Where are the crypts of Lieberkühn?
3 What announcement was inspired by Elvis’s refusal to do encores?
4 Which mammal is named after a mythological half-woman, half-snake?
5 Which micronation is based on HM Fort Roughs in the North Sea?
6 In the US, what is known as “the vine that ate the South”?
7 In terms of length v width, what is the world’s narrowest country?
8 What was kept at Westminster Abbey from 1296 to 1996?
What links:
9 Catharine; Sanditon; The Watsons?
10 Blue Crush; From Here to Eternity; Lilo & Stitch; The Descendants?
11 1900; 1924; 2024?
12 Exodus 20:2–17 and 34:11–26; Deuteronomy 5:6–21?
13 Daryl Dixon; Dead City; The Ones Who Live; World Beyond?
14 Bog in Scotland; goldmines in Japan; Roman road in Italy; sand dunes in Brazil?
15 Francis Drake; Clint Eastwood; Jerry Springer; Richard Whittington?

The answers

1 Kaiser Wilhelm II.
2 Small intestine.
3 “Elvis has left the building.”
4 Echidna.
5 Sealand.
6 Kudzu.
7 Chile.
8 Stone of Scone/Destiny.
9 Unfinished works by Jane Austen.
10 Films set in Hawaii.
11 Paris Olympics.
12 Lists of the Ten Commandments in the Bible.
13 TV spin-offs from The Walking Dead.
14 Named Unesco world heritage sites in 2024: Flow Country; Sado Island gold mines; Via Appia; Lençóis Maranhenses national park.
15 Mayors: Plymouth; Carmel-by-the-Sea; Cincinnati; London.