Nice table of figures, but don't forget about income tax. Around £40000 will go on tax and NI when jumping to the circa £120000 bracket. Just over £20000 is lost on a circa £75000 pay band. But that said if pension contributions were say 10% it works out at about £1800 per month difference in take home. I doubt FREA allowance will go up anytime soon after the recent (?) rise.
How will tax/NI/pension contributions change? I love a good guessing game.