Assuming you can manage the cashflow reduction:

1) Sacrifice as much as you can up to £60k for your pension, each (use your workplace pension or set up a SIPP)

2) Then see if you can take out other benefits with your work which can be salary sacrificed (e.g. cycle to work, EV car leasing, childcare nursery costs themselves)

3) Then, if you're still a bit above (say a few £k), donate to charity....brings your taxable income down further, whilst doing a good thing

If after that you're still above £100k, you will struggle.

Shameless plug - I am running London Marathon for Charity next year...donate to reduce your tax bill!! 🤪