Exhibitions and trade shows are temporary events, and so generally exhibition stands and equipment are exempt from import duties and taxes, provided you follow the correct procedures. The most common method is using an ATA Carnet, though there are alternatives.
An ATA Carnet has many conditions, one being that the goods must be temporary imports and must be re-exported in their original state within 12 months without being processed, repaired, or sold. Therefore, they do not cover consumables or giveaways, only the stand and equipment.
More information on the ATA Carnet can be found on the GOV.UK website – https://www.gov.uk/guidance/apply-for-an-ata-carnet
