What links Selena Gomez, James Bolam and David Jason? The Saturday quiz

The questions

1 Which film, according to Barry Norman, featured the “oldest bunch of teenagers in the world”?
2 What is burned at the culmination of the Up Helly Aa festival?
3 Spanish civil war heroine Dolores Ibárruri popularised which slogan?
4 Which marine predators have worn dead salmon “hats”?
5 The rivers Trent, Don, Calder and Aire are crossed by which motorway?
6 Which cathedral is the home of the Church of England’s Diocese in Europe?
7 What were famously designed by Humphrey Paget and Christopher Ironside?
8 Which US firm is the world’s biggest asset manager?
What links:
9 Shirley Bassey; Lulu; Tina Turner?
10 Robert Aske; Francis Bigod; Robert Kett; Thomas Wyatt?
11 Grasshopper pie; Rocky Mountain oyster; Scotch woodcock; Welsh rabbit?
12 Dorney, Bucks; Hadleigh, Essex; Waltham Cross, Herts; Isle of Portland, Dorset?
13 N (3); B (3); R (5); Q (9)?
14 Bamboo; chrysanthemum; orchid; plum blossom?
15 James Bolam; Victoria Coren Mitchell; Gregor Fisher; Selena Gomez; David Jason?

Confounded by the chrysanthemum clue? Photograph: Somnuk Krobkum/Getty Images

The answers

1 Grease.
2 Viking ship replica.
3 No pasarán! (They shall not pass!).
4 Killer whales (orca).
5 M1.
6 Gibraltar (Cathedral of the Holy Trinity).
7 Royal Mint coins.
8 BlackRock.
9 Sang theme songs to Gold-based James Bond films: Goldfinger; The Man with the Golden Gun; GoldenEye.
10 Led Tudor rebellions.
11 Misleading foods: marshmallow; bull testicles; scrambled egg; cheese on toast.
12 Out of London locations for 2012 Olympics: rowing and canoeing; mountain biking; canoeing; sailing.
13 Approximate pawn equivalents in chess: knight; bishop; rook; queen.
14 So-called Four Gentlemen of Chinese plants.
15 Stars on Only … TV series: O When I Laugh; O Connect; O Child; O Murders in the Building; O Fools and Horses.