This guidance refers to arriving in person into the UK:
Bringing personal items to the UK if you’re coming from Ukraine
For bringing other personnal belongs via DHL you will need to follow the Transfit of residence guidance .
Transfer of Residence relief, which relieves customs duty and import VAT on people’s personal property when they move their main place of residence to the UK.
There is no limit to how long the goods can be in the UK, and no value limit.
Prior application is usually required, although it is possible to claim this relief retrospectively.
The rules and process for claiming are covered in guidance:
Transfer of residence to the UK