Welcome to the forum Paul. Unfortunately, death and taxes are inevitable. Some countries don’t seem to collect (like in the US) and some are vigilant. In the US we are supposed to self report some things but the nuances are left to those with far more expensive than I (I rarely purchase outside the US).
Since brexit, many members here have had to change their buying habits in both the UK and EU as the additional VAT has just become too much on top of the purchase price. It does tend to keep nice watches in country though which can work in your favor if one you want pops up nearby as less people will be interested.
One thing you should be cautious of is posting publicly your desire to know how to circumvent duty/taxes. You won’t find many people willing to talk openly about that subject.