National Commercial Cleaning Specialists. The Cleaning Services Group provide a multitude of commercial contract and specialist cleaning services to small and large organisations throughout the UK. We are specialists in Commercial Kitchen Deep Cleans and Extraction System Cleans, cleaning to TR19 standard with full photographic audits, reports and certificates provided. NAAD UK registered. Our Contract Cleaning Services include Daily Office Cleaning, Floor Cleaning & Maintenance Programmes for Retailers and Showroom Cleaning. Servicing from single premises to multiple UK-wide Companies. Our One-Off and Specialist Cleans include Builders & Post-Refurbishment Cleans, High Level and Warehouse Cleans and External Cleaning. The Cleaning Services Group Ltd has been established since 2008. We are ISO 9001, 14001 and 18001 certified.