2026 1st March Mennekes - 3% 1st February CK Tools - Avg 1% Hellerman Tyton - Avg 3% Domus Ventilation - 3% 2nd January Niglon - avg. 4% 1st January Scame - 5% Airflow - 4.25% Environment - 5.25% Rolec - TBC Metpro Innovations - 4.8% National Ventilation - 3.8% Vent-Axia - 3.8% Walraven Walraven Phenblox Load Bearing Phenolic Bocks (BD00) - 6% All other Walraven article groups - 3% 2025 1st December Atkore - 10% (Marco uPVC range) 10th October Dimplex - 3%