EHS Brann's creative director's Danish wife, Dorte, doubtless had some idea of the mayhem that would ensue when Collister invited a paltry, er, 50 people down to his house in leafy Kent to watch the game.
Dorte, deserving a medal for agreeing to watch the game with that many England fans, had nevertheless made great attempts to get some patriotism of her own going. Unable to find any paraphernalia, the resourceful Dane went all the way to the Danish Embassy, where, clearly feverish with World Cup anticipation, the helpful people said they had absolutely no idea where she could get any flags.
Undeterred, Dorte joined the English-supporting throng at home for the game - until disaster struck. "It all went a bit pear-shaped when, after five minutes, England scored, Collister remembers sheepishly, at which point Dorte extracted herself from the hordes of whooping English nutters and retired to a simmering distance. "She was clanking around in the garden. But every so often she would stick her head in and shout 'Komse Denmark!' heartily, he remembers.
After trouncing the Danes the agency band, ROY, threatened to rush out and sing their World Cup anthem. Perhaps shrewdly, captain Collister chose the moment to pop out for supplies for the hungry celebratory hordes.
"I was a bit pissed, and went to Tesco's with someone, he remembers hazily.
However, his sartorially criminal combination of socks and Timberlands did not go unnoticed by his blushing comrade, who later said accompanying him had been the most embarrassed he'd ever been in his life. "I must have looked like a demented old geezer, Collister concedes.
As for dejected Dorte, she can't have been too miserable, as she didn't get to bed until 4am. "When she gets her drinking hat on she's a real Viking, the proud husband says, all misty-eyed.