import taxes – Should I pay for importing my iPhone in the UK?

Until now when arriving from EU to the UK I was walking green corridors and life was good.

Now gov.uk website says this (https://www.gov.uk/duty-free-goods/arriving-in-Great-Britain):

You can bring in other goods worth up to £390 (or up to £270 if you arrive by private plane or boat).

If you go over your allowance you pay tax and duty on the total value of the goods, not just the value above the allowance.

You may have to pay customs duty if you exceed your allowances.

You may also have to pay import VAT.

Does that mean that now I should go in the red corridor and declare my iPhone 12 and my Apple Watch Series 6? And pay every time I move through the border? Or keep receipt?