Just taking a couple of sample dates, London to Singapore 25th Sep -> 17 Oct.
Standard: GBP 489
Business: GBP 3500
First: 5800
3500 is a little bit of an exaggeration. Quick check of a long haul flight London to Taipei £1140 business class. Though it is with China Airlines

ahh whoops thats one way. return price is £1800
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