How to get a free flight upgrade and how to cut credit card costs even if rejected for 0%

Martin talks about how to get free flight upgrades and how to cut your credit card interest even if rejected for 0%. He also has tips on how you and a friend can ear £50 each for switching energy providers and the best way your kids can get an 'actual' letter from Santa this Christmas. 02.36 Flight upgrades 05.10 Inflation rate 11.32 More flight upgrades 20.35 Credit card interest rates 36:00 Matin's tips on how you and a friend can make £50 by switching energy companies 37:28 Martin's tips on how your kids can get an 'actual' letter from Santa 39:54 More flight upgrades 44:12 Mastermind: how much interest can your children earn before it is taxable?