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Expert VAT and Accountancy Solutions in Broxbourne
Established to provide expert VAT and accountancy solutions, LYSI combines deep technical knowledge with a client-focused approach. Our team supports businesses of all sizes, from start-ups to international corporations, offering tailored financial guidance and compliance services. With decades of collective experience, including specialist VAT expertise gained through roles at major firms and direct engagement with HM Revenue & Customs, we deliver precise, strategic advice.

We prioritise transparency, fixed fees, and on-site visits to ensure accessibility and build long-term trust. Our founder, Constantine Malekkou, a Chartered Certified Accountant and Chartered Institute of Taxation-qualified professional, leads a team committed to simplifying complex financial obligations while maintaining the highest ethical standards.
Services
VAT Consultancy Accountancy Services Auditing Company Secretarial Payroll Administration Tax Planning Business Start-Up Support Financial Management VAT Health Audits HMRC Representation
Highlights and features
  • We offer over 20 years of specialist VAT and accountancy experience.
  • Our team includes Chartered Certified Accountants and Taxation-qualified professionals.
  • We provide fixed fees and free initial consultations for transparent pricing.
  • We deliver on-site visits and tailored financial strategies for your business needs.
  • We combine HMRC expertise with a client-centric approach to compliance.
Associations and certifications
  • Chartered Certified Accountant
  • Chartered Institute of Taxation
What people say
Personalised service Tirelessly Answered quickly Efficient service Exceptional expertise
Services
VAT Consultancy
LYSI provides specialist VAT consultancy, including registration, compliance, health audits, and HMRC representation. We help businesses navigate complex VAT legislation, maximise cash recovery, and avoid penalties. Our expertise ensures tailored solutions for start-ups, UK firms, and international companies.
Accountancy Services
We offer full accounting services, from annual accounts preparation to PAYE compliance and management reporting. Our support reduces administrative burdens, ensuring accurate financial records and statutory compliance while enabling clients to focus on core operations.
Auditing
LYSI conducts statutory and internal audits with efficiency and precision. We ensure compliance with legal requirements, identify financial strengths and weaknesses, and provide actionable recommendations to enhance business performance and mitigate risks.
Payroll Administration
Our payroll services include payslip generation, PAYE and national insurance compliance, and pension scheme administration. We streamline payroll processes, ensuring accuracy in employee payments and adherence to HMRC regulations for hassle-free management.
Tax Planning
We provide strategic tax planning for businesses and individuals, optimising tax efficiency through reliefs, allowances, and structuring. Our services cover corporation tax, personal tax, inheritance planning, and cross-border tax compliance to safeguard and grow client assets.
People
Constantine Malekkou
Founder
A Chartered Certified Accountant and Chartered Institute of Taxation-qualified expert, Constantine has over 20 years of VAT and accountancy experience, including roles at Arthur Andersen and HMRC engagement. He leads LYSI's client-focused approach to financial solutions.
Questions
What VAT services does LYSI offer?
We provide VAT registration, compliance, health audits, HMRC representation, and strategic planning to maximise recovery and avoid penalties for UK and international businesses.
How can LYSI support start-up businesses?
We assist with business structure selection, tax-efficient planning, financial projections, and compliance requirements, ensuring new ventures establish robust financial foundations from inception.
Do LYSI handle international VAT obligations?
Yes, we support overseas companies navigating UK VAT regulations, including registration, return submissions, and HMRC communication to ensure compliance and optimise tax positions.
What accounting services are available?
We offer annual accounts preparation, management reporting, bookkeeping, payroll, audit services, and compliance support tailored to sole traders, SMEs, and large corporations.
How does LYSI ensure client satisfaction?
We provide fixed fees, free initial consultations, on-site visits, and responsive communication, combining technical expertise with a personalised approach to meet client needs.