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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.

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

Looking for a fast, hassle-free way to contract? No Worries Red Umbrella makes contracting effortless—with instant payroll, no IR35 worries, and zero admin stress.

We’ve been helping contractors get paid quickly and compliantly since 2005. Our FCSA-accredited umbrella service guarantees you’re working with a fully compliant, transparent, and reliable provider, trusted by agencies, end clients, and thousands of contractors across the UK.

Why Choose No Worries Red Umbrella? ✅ Get Paid Fast – Daily payroll runs mean you get paid the same day we receive funds from your agency. No delays, no hassle. ✅ Zero Setup or Exit Fees – No lock-in periods, no hidden costs. Join or leave whenever you want. ✅ Fully Transparent – Fixed, all-inclusive fees with no surprise deductions. We handle all tax, NI, and compliance so you don’t have to. ✅ 100% Online & Instant Setup – Get started in under 10 minutes and submit timesheets from anywhere. ✅ Expert Support – Our team of payroll, tax, and compliance specialists are on hand to make contracting smooth and stress-free. ✅ Free Insurance Cover – £10M Employers’ Liability, £5M Public Liability, and £5M Professional Indemnity included at no extra cost. ✅ Pension & Perks – Access flexible salary sacrifice pension contributions and tax-saving schemes like Cycle to Work.

Whether you're new to umbrella contracting or switching from another provider, No Worries Red Umbrella gives you a stress-free, fully compliant payroll solution that works for you.

Get set up today and start getting paid—fast, simple, no worries. 🚀

A team of experienced industry professionals who are passionate about our core values, the temporary recruitment industry and of course, the flexible workforce market in the UK. Collectively, we bring together over 90 year’s industry experience from across the recruitment, contractor payroll and contractor accountancy sectors. We’ve worked with some of the largest and most established players in both the UK and international payroll markets. We bring a wealth of experience, knowledge and understanding – but most importantly, we bring a fresh approach to our duty of care – because we care.

Social Work Employment Services is the UK's only not for profit and ethical umbrella company designed for and delivered by social workers in partnership with the British Association of Social Workers

SG Umbrella is run by experienced contractor accountants, designed for contractors and backed by the UKs leading contractor compliance body, the FCSA. Rest assured that you’re getting the best advice and the best service:

SUPER FAST PAYMENTS Once your client or agency has paid us we turn the payments around without delay – so you get your money as quickly as possible

TRULY ALL INCLUSIVE PRICING There are no hidden costs…everything you need is included in your monthly or weekly fee

EXPERIENCE AND KNOWLEDGE Our team are the very best in the industry with years of contractor accountancy and taxation experience. Their qualifications include ICAEW, ACCA, AAT, ATT and CTA and your fee entitles you to unlimited advice and support, including with IR35 and tax planning

GROW AND FLEX WITH US Set up a Limited company with SG Accounting and switch between the two if needed due to IR35. Just ask which set-up would be best for you.

REAL PEOPLE EVERY TIME You speak directly to a real person when you call or email us. No call centre or “press button 1 for this and button 2 for that” service

NO MINIMUM CONTRACT We are so sure you’ll love our service we don’t have a minimum commitment. Fees are deducted from your pay so there are no up-front costs

COMPLIANCE AS STANDARD We’re FCSA Accredited, assuring the highest standards of compliance. As contractor experts, we can advise you on IR35 and Tax matters too

WELL KNOWN AND ESTABLISHED We have been established for more than 20 years dealing specifically with contractors, consultants and freelancers.

Pay Guardians operate a simple and efficient umbrella and PEO service for agencies and workers. Our processes are fully documented and comply wholly with employment and tax legislation leaving you free from the burden of ensuring yours and your temporary workers affairs are fully managed. Our team of qualified accountants and payroll specialists with years of experience will ensure piece of mind and provide the highest quality of personal service throughout.

Rebus offer PAYE umbrella and self-employed solutions for the temporary contractor industry . We provide the highest quality of service to ensure you receive your payment for the work you undertake. We are owned by a former HMRC Tax Inspector and our staff have over 25 years experience in the industry.

TJW Contract Solutions offer both Umbrella and CIS payroll services to contractors and agencies alike. We take pride in offering a personal level of service thar guides you through the entire process, from start to finish. Our friendly, professional team is always available to ensure that you are paid accurately and on time, every time. We're here to make payroll simple, compliant and stress free.

So call us today, we would love to assist you.