Custom UK CLI VOIP Provider Needed

I'm seeking SIP credentials from a reliable VOIP provider. This is for business communications, and I need to make UK outbound calls displaying a custom UK CLI on mobile numbers.

Requirements:
- Custom UK CLI display for mobile numbers
- No KYC or verification processes

Ideal Skills and Experience:
- Experience with VOIP services and SIP credentials
- Knowledge of KYC regulations and workarounds
- Familiarity with UK telecommunication regulations

Please provide any relevant experience and ensure the solution meets all requirements.