Class 2 of what? Can I suggest you read up on Approved Document B

https://www.gov.uk/government/publications/fire-safety-approved-document-b

Shopping centres would fall under Volume 2 "Building other than Dwellings"

The National Class tests (BS 476 series) are being withdrawn with two major changes already written:

- in March 2025 we lose the national classsification testing for roof coverings.

- in September 2029 we lose the fire resistance (minutes of resistance, insulation and integrity) of systems

Table 6.1 refers to the Reaction to Fire Classification of linings where in large circulation spaces materials should be classified as B-s3,d2 according to BS EN 13501-1.

This is only what I have picked up post incident over the years and mainly Germany but maybe some of this will help to point you in the right direction:

Common Fire Rating Standards:

• Class 1 or Class A Fire Rating: This is often required for exhibition stands, especially in enclosed spaces or where there are large crowds. Materials with a Class 1 or Class A fire rating are the most resistant to fire spread.
• B1 (DIN 4102-1 Standard German): In many European countries, materials need to meet the B1 fire retardancy standard, indicating that the material is flame-resistant and does not contribute significantly to fire spread.
• (and Also BS476) EN 13501-1: The European standard for fire classification of construction products. Materials should ideally be rated as B-s1, d0, which means:
  • B: Limited combustibility.
  • s1: Low smoke production.
  • d0: No droplets during combustion.

Material Requirements:

• Non-combustible or Flame-Retardant Materials: Use materials such as treated fabrics, flame-retardant MDF, and fireproof paints. PVC, foam board, and untreated wood may be restricted or require treatment.
• Certification: Many venues require proof of fire rating certification for all stand materials, so obtaining certification documents for flame-retardant materials is essential.

3. Venue and Local Regulations:

• Venue Guidelines: Some exhibition centres have their own fire safety guidelines. Venues like the NEC or Messe Frankfurt have specific fire retardancy requirements for all stand elements, including floor coverings, walls, and ceiling structures.