Hello @mirek,
Could you confirm that your Testing Scenarios in Sandbox is set to ‘Happy Path’? Just to double-check that the expiration isn’t because of the scenario configured in your account.
It seems that London addresses are assigning well, so you could try something like:
36 Sackville St, London W1S 3EQ, UK
Granville Pl, London W1H 6PA, United Kingdom