You are entitled to seek legal advice. However, CCCS will only allow a reasonable time for your legal adviser to arrive before a raid is executed, provided that it is reasonable in the circumstances and it does not cause undue delay or impede investigations.
The request is also subject to compliance with appropriate conditions imposed, e.g., sealing of cabinets, keeping business records in the same state and place as when entry into the premises was effected, suspending external email and allowing the investigating officer or inspector to remain in occupation of selected offices, etc. CCCS will not wait for your legal adviser to arrive if you have an internal legal adviser on site or if prior notice had been given on the raid.