
As one of the UK’s largest and most trusted Umbrella companies, we combine cutting-edge systems with deep industry expertise to ensure your pay is accurate, reliable, and always on time.
We’ve been supporting contractors and recruitment agencies since 1989, paying over 10 million people to date. Our commitment to exceptional customer service, compliance and payroll accuracy has earned us consistently excellent Trustpilot reviews making us the trusted choice for contractors across the UK.
Why Workwell?

Payroll, compliance and onboarding for agencies, MSP's and end hirers, with unique financial wellbeing tools for workers.
Delivered via innovative software that fits seamlessly around your operation; brand your own user experience and configure your onboarding processes.

Our focus at Atom is ensuring we provide simple and cost-effective services to those who wish to contract or freelance in the UK and internationally.
To that end, we offer Atom Freelance and Atom International, the banners under which we offer our Umbrella Company, Construction Industry Scheme, and international payroll services.
We use up-to-date technology and have a team of highly experienced staff who ensure our clients are free to enjoy the flexibility of the contracting and freelancing lifestyle.
Please email info@atomhub.co.uk to speak to the team about our services.

Generate is a customer-focused contractor management company, delivering compliant and streamlined contractor payroll solutions to recruitment agencies and contractors across the UK and internationally.
We are proud to be an FCSA member, REC business partner and iWORK partner and have been recognised by the London Stock Exchange's ‘1000 Companies to Inspire Britain’ for three consecutive years.
Our commitment and dedication to customer care and compliance is why recruitment agencies trust us with their contractors and contractors trust us with their pay.
As part of the Generate family, you will be supported every step of the way and can rest assured you are receiving the best possible service at all times.
We offer our contractors:

Established in 2002, ICS Accounting has been supporting contractors, freelancers and small business owners across the UK for over 18 years. Our ethos of trust, care and compliance enable you to focus on your job without the task of endless paperwork, ensuring you are operating compliantly.
The ICS Accounting Umbrella solution provides an employment solution for independent workers, taking the stress out of contracting. ICS Accounting will process your pay either weekly or monthly, paying relevant Tax and NI liabilities to HMRC and the rest to yourself, ensuring you’re paid accurately and on time. As an employee, you will receive full employment rights, including holiday pay and sick pay, cover from our comprehensive insurances and access to our comprehensive employee benefits portal. Through the portal you will find huge discounts on your shopping as well as a wellbeing area providing education, support and tools to be the best version of yourself at home and at work.

MainPay is a leading provider of services to agency workers across the UK. We pride ourselves on our outstanding service, our people and bespoke systems.

Your trusted partner, experts in Legislation, Contracts, Insurances and Payroll. Honesty and transparency are at the heart of our operations and with over 25 years experience in contractor engagement, we get it. We offer a tailored and consultative approach to our workers, agencies and end clients and we'll be your first point of contact for any advice or guidance you need.

Why Core?
We put you first! We have a team of experts here to ensure you have all the support you may want or need through every process. We work hard to ensure our reputation is second to none and you can rest assured that compliance, efficiency, and professionalism are key values we uphold here at Core. We are an accredited member of Professional Passport and a tier one founding member of trade association body Prism.
Lauren Baker also sits on the executive board of Prism as their Payroll Intermediary Representative, meaning we are always ahead of the curve when it comes to legislation changes. We work with thousands of contractors in both the Public and Private Sectors and are specialists in IR35, allowing you to safely navigate this legislation and get on with what you do best, your contracting work. We would welcome a call; Matt and the team would be delighted to hear from you on 0800 211 8121. You’ll receive:
• Dedicated Relationship manager
• Set up (paperless) in as little as 24 hours with no exit fee
• Online portal for payslips and document viewing
• IR35 assessments
• Weekly, Bi-Weekly or Monthly payroll services
• Insurance cover, Professional Indemnity up to £5 million, Employers Liability up to £10 million, Public Liability up to £10 million
• Workplace pension via NOW or Salary Sacrifice
• Full statutory employment rights

Big Fish Group Limited is a leading UK provider of umbrella PAYE and CIS payroll services, dedicated to serving contractors and recruitment agencies with unwavering reliability. We challenge the traditional stereotype of the sector by combining rigorous professional standards with a genuine passion for what we do. Founded on the principles of authenticity and dedication, we understand that credibility and compliance are the cornerstones of the recruitment industry. For agency partners, from boutique firms to multi-national MSPs, we offer a transparent, "straight-talking" partnership that prioritises your reputation and the welfare of your workforce. While we operate with energy and a personable approach, we never compromise on quality. We are committed to delivering the precise services our partners need, ensuring contractors are paid correctly and on time, every time. Commitment to Compliance
In an industry where regulatory adherence is paramount, Big Fish Group stands as a beacon of trust. We are proud to be FCSA-accredited and SafeRec-certified, ensuring our processes are independently audited and fully compliant with UK tax law and associated legislation. Our accreditations are complemented by our cloud-based payroll compliance portal, Lighthouse. Lighthouse provides our recruitment agency partners and end clients with direct access to and insight into every stage of our payroll process, as well as real-time visibility into our PAYE liability information. Our clients are never left wondering and can rest assured that their supply chain is secure, compliant, and meets the highest standards of integrity.
Big Fish: Not Your Average Umbrella
• Experienced Leadership: Founded and led by a team with over 30 years of combined experience in the payroll and recruitment sector.
• Unrivalled Availability: We understand the demands of the recruitment cycle. We provide exceptional customer service and support that extends beyond the 9-to-5. When we say 24/7, we mean it.
• Comprehensive Service Range: Expert provision of Umbrella PAYE and CIS payroll services tailored to the needs of the modern workforce.
• Reliability & Accuracy: A steadfast commitment to ensuring accurate, on-time payments for contractors, safeguarding agency relationships.
• Client-Centric Culture: A friendly, energetic team that prioritises the things that matter most to our customers, delivering solutions with a personal touch.